John the Baptist: Gospels, Josephus, Qur'an and Mandaeans

John the Baptist is one of the few figures in the Gospels who also appears in a non-Christian source from the first century. He is also one of the rare figures revered by more than one religion. For Christians he is the forerunner of Jesus. For Muslims he is the prophet Yaḥyā. For the Mandaeans, a small religious community of Mesopotamian origin, he is the teacher par excellence. This article compares the sources and carefully distinguishes two levels: what historians consider probable and what each tradition affirms by faith.

The available sources

For John we have two main groups of first-century texts. The first consists of Christian writings: the four Gospels and the Acts of the Apostles. The second is a passage by the Jewish historian Flavius Josephus, who wrote in Greek towards the end of the century. The later traditions, namely the Qur'an and the Mandaean texts, belong to another era. Historians make little use of them to reconstruct the historical John, but they are invaluable for understanding how his figure was remembered and transformed.

What the Gospels tell us

The Gospel of Mark, which most scholars regard as the earliest, opens with John himself. He preaches in the wilderness a “baptism of repentance for the forgiveness of sins” (Mark 1:4), wears camel hair and lives on locusts and wild honey (Mark 1:6). His appearance recalls that of the prophet Elijah (2 Kgs 1:8). The evangelists link his mission to Isaiah 40:3, the “voice crying in the wilderness”, and to Malachi, who announces the return of Elijah before the day of the Lord (Mal 3:23-24).

Each Gospel adds details of its own:

Luke tells of John's birth to Zechariah and Elizabeth, a relative of Mary (Luke 1:5-80). He places the start of John's preaching “in the fifteenth year of the reign of Tiberius” (Luke 3:1), that is, around AD 28-29.
Matthew reports John's hesitation when Jesus asks to be baptised (Matt 3:14-15). He also records Jesus' verdict: among those born of women no one greater than John has arisen (Matt 11:11).
John the Evangelist does not describe Jesus' baptism directly. He has the Baptist say: “He must increase; I, instead, must decrease” (John 3:30). He also relates that Jesus' first disciples had been disciples of John (John 1:35-40).

On his death, Mark gives the fullest account (Mark 6:14-29), which Matthew repeats in shorter form (Matt 14:1-12). John is arrested by Herod Antipas, tetrarch of Galilee and Perea, for criticising his marriage to Herodias, his brother's wife (Mark 6:18). During a banquet Herodias' daughter dances, and her mother obtains the prophet's head. The Gospel does not name the girl. The name Salome comes from Josephus, who mentions it in another passage of his work without connecting her to John's death.

The passage in Josephus

In the Antiquities of the Jews (18:116-119), Josephus recounts the defeat of Herod Antipas' army by the Nabataean king Aretas IV. He adds that some Jews interpreted it as divine punishment for the killing of John, “called the Baptist”. He describes him as a good man who urged the Jews to practise virtue, justice towards one another and piety towards God, and to come together in baptism. According to Josephus, that baptism was not meant to obtain forgiveness for particular sins. It was a purification of the body, which presupposed a soul already made pure by righteousness.

In this version the reason for the execution is political. Herod feared that John's influence over the crowds might lead to a revolt. For this reason he had him imprisoned in the fortress of Machaerus, east of the Dead Sea, and put to death. Most scholars consider this passage authentic. Unlike the one about Jesus, it shows no obvious signs of later Christian interference.

What historians can say

Putting the sources together, scholars reach some widely shared conclusions. Other questions remain open.

The baptism

It is very likely that John practised an immersion in water linked to moral conversion, in a setting of expectation that God was about to intervene. The nickname “Baptist”, found both in the Gospels and in Josephus, suggests that this immersion was distinctive and recognisable. Perhaps John himself immersed others, rather than letting them immerse themselves as happened in ritual baths. The two sources, however, interpret the rite differently. Mark speaks of forgiveness of sins, Josephus of purification of the body. Josephus was writing for a Graeco-Roman audience and tended to present Jewish movements as philosophical schools. The Gospels, on the other hand, read John in the light of Jesus. Neither perspective is neutral.

The relationship with Jesus

Jesus' baptism by John is considered one of the most secure facts about Jesus' life. The reason is the so-called “criterion of embarrassment”. For the first Christians it was awkward that their Lord had undergone a baptism of repentance administered by someone else, and yet the event is reported. This can be seen in Matthew's clarifications and in the silence of the fourth Gospel. Many scholars therefore think that Jesus was for a time close to John's movement, perhaps as his disciple, before beginning a mission of his own.

There are also hints of some rivalry between the two groups. John 3:22-30 and 4:1-2 allude to disputes between the disciples. Acts speaks of believers in Ephesus who knew “only the baptism of John” (Acts 18:25; 19:1-7). The question John sends from prison, “Are you the one who is to come?” (Matt 11:3; Luke 7:19), may reveal genuine uncertainty. That John recognised Jesus as the Messiah is a statement of faith by the Christian communities. The historian can neither prove it nor rule it out.

The execution

That John was killed on the orders of Herod Antipas is all but certain, because independent sources attest it. As for the reasons, the two versions are not mutually exclusive. Criticising a marriage that had created tension precisely with the Nabataean kingdom could carry political as well as moral weight. The details of the banquet, by contrast, are judged more cautiously. Many exegetes see in them literary features that recall the story of Esther or the figure of Jezebel.

Links with Qumran

The Qumran community also cited Isaiah 40:3 to justify its life in the wilderness (Community Rule, 1QS 8:13-14), and practised frequent purification baths. This has given rise to the hypothesis that John was in contact with that milieu. It is an attractive hypothesis but an unproven one, and it should be presented as such.

Baptism in its Jewish context

To understand John we need to start from Jewish ritual immersion. The Torah prescribes washings for returning to a state of purity after various forms of impurity (for example Lv 15). Over time the ṭevilah (Hebrew: “immersion”) in the miqveh, literally “gathering of water”, became widespread. This is a pool fed by “living” water, that is, spring water or rainwater. The Mishnah devotes the tractate Miqwaʾot to it and sets a minimum quantity of water. Archaeologists have found numerous miqvaʾot from the Second Temple period in Jerusalem, at Qumran and at other sites.

John's baptism fits into this practice but differs from it in some respects:

it took place in the river Jordan, not in a constructed pool;
it seems to have been tied to a moment of conversion, and was probably not repeated;
it was associated with a prophetic message about imminent judgement.

Scholars also discuss proselyte baptism, that is, the baptism of non-Jews who converted to Judaism. The firm evidence for this practice is later, however, so it is unclear whether it influenced John. The miqveh still exists today. It is used, for example, by observant women in keeping with the laws of family purity, and in conversions.

Later legacies

In the Christian tradition

Christianity made John the “forerunner”. In the Orthodox East he is called Pródromos, “the one who runs ahead”. He is the only saint whose birth (24 June) and death are both celebrated by the Church, the latter commemorated on 29 August as the “beheading”. In Byzantine iconography he appears alongside Mary on either side of Christ, in the composition known as the Deesis. Christian baptism, however, is not simply a continuation of his: the Gospels present it as a baptism “in the Holy Spirit” (Mark 1:8).

Yaḥyā in the Qur'an

In the Qur'an John bears the Arabic name Yaḥyā. It differs from Yūḥannā, the form used by Arabic-speaking Christians. His birth is narrated in two passages. The prophet Zakariyyā, now old, prays for an heir and receives the announcement of a son (Qur'an 3:38-41; 19:2-15). The text stresses that no one before him had borne that name (19:7). Yaḥyā receives wisdom from childhood and the call to “hold fast to the Scripture” (19:12). He is described as chaste and devout, and he confirms “a word from God” (3:39), an expression that commentators usually refer to Jesus (ʿĪsā). Sura 19:15 wishes him peace on the day of his birth, of his death and of his resurrection. He also appears in the list of the righteous (6:85) and again in 21:89-90.

The Qur'an mentions neither the baptism nor the beheading. Later Islamic tradition, however, knows of his martyrdom. According to some accounts of Muḥammad's Night Journey, the Prophet met Yaḥyā and ʿĪsā in the second heaven. In the Great Umayyad Mosque of Damascus a shrine is traditionally associated with his head, venerated by Muslims and Christians alike.

The Mandaeans: John as the great teacher

The Mandaeans follow a religion of a Gnostic kind. They believe in a world of light separate from the material one and in a salvation bound up with knowledge (manda, in Mandaic Aramaic). They have traditionally lived in southern Iraq and south-western Iran, and today they are scattered in an international diaspora as a result of war and persecution. Their sacred texts, written in an Aramaic dialect, include the Ginza Rabba (“Great Treasure”) and the Book of John. John, called Yahia Yuhana, appears in them as the greatest priest and teacher. The Mandaeans do not regard him as the founder of their religion. Jesus, in these texts, plays a negative role instead.

Their central rite is the maṣbuta, a baptism repeated many times in the course of a life, always in running water. Every river suitable for the rite is called yardena, that is, “Jordan”. Scholars do not agree on the origins of the Mandaeans. Some believe they really do come from the Jordan valley. Others think that John's role was emphasised later, perhaps partly to gain the status of “people of the Book” under Islamic rule, as “Sabians” (ṣābiʾūn, Qur'an 2:62; 5:69; 22:17). The identification of the Qur'anic Sabians with the Mandaeans is itself debated, after all.

Compared with other traditions

Purification with water is one of the most widespread religious gestures in the world. Islam has the minor ablution (wuḍūʾ) before prayer and the major one (ghusl), a full washing of the body. In Hinduism ritual bathing (snāna) in sacred rivers, above all the Ganges, is considered purifying, and millions of people practise it during the Kumbh Melā. In Japanese Shinto, misogi involves standing under a waterfall or immersing oneself in cold water. In Buddhism water has a more symbolic use, as in offerings and blessing rituals.

John's baptism stands out in one respect: the outward gesture is tied to a moral choice and to an expectation of the future. Josephus says so clearly when he states that the water presupposes a soul already purified by righteousness. This tension between rite and inner life recurs in many traditions. The Buddha himself, according to some Pāli texts, questioned whether bathing in rivers could wash away bad karma.

What we can take from this

The figure of John the Baptist teaches, above all, a method. The same person, read through different sources, shows different faces: the Christian forerunner, Josephus' virtuous man, the chaste prophet of the Qur'an, the teacher of the Mandaeans. None of these portraits is a photograph. Each answers the questions and needs of the community that preserved it. For the reader, a few practical pointers may be useful:

Read the texts directly, with the references to hand. The passage in Josephus is short, and comparing it with Mark 1 and 6 is an excellent exercise.
Keep the levels separate. That John baptised and was killed by Antipas is history. That he was the forerunner of the Messiah or a prophet of God is faith. Both statements are legitimate, but they answer different questions.
Respect living communities. The Mandaeans are a fragile minority. Getting to know them also means remembering that John does not belong to a single tradition.

Finally, his core message has survived all these readings: water washes nothing away unless it is accompanied by a change of life. It is an idea that crosses religious boundaries, and one that anyone can test in their own experience.

John the Baptist in the Gospels, Josephus, the Qur'an and the Mandaeans