Mark 6:29

(ubi sup.) There follows, And when his disciples heard of it, they came and took up his corpse, and laid it in a tomb. Josephus relates, that John was brought bound into the castle of Macheron, and there slain; and ecclesiastical history (Theodoret. Hist. Eccles. 3:3) says that he was buried in Sebaste, a city of Palestine, once called Samaria. But the beheading of John the Baptist signifies the lessening of that fame, by which he was thought to be Christ by the people, as the raising of our Saviour on the cross typifies the advance of the faith, in that He Himself, who was first looked upon as a prophet by the multitude, was recognised as the Son of God by all the faithful; wherefore John, who was destined to decrease, was born when the daylight begins to wax short; but the Lord at that season of the year in which the day begins to lengthen.

Upon hearing this, his disciples came, took away his body, and placed it in a tomb. Josephus reports that John, being bound, was taken to the fortress of Machaerus, where he was beheaded. Ecclesiastical history narrates that he was buried in Sebaste, a city of Palestine, which was once called Samaria. But in the time of the leader Julian, pagans, envying the Christians who piously visited his tomb, attacked the monument, scattered the bones across the fields, and, upon gathering them again, burned them with fire and once more dispersed them across the fields. At that time, there were monks from Jerusalem present there, who, mingling among the pagans as they collected the bones, gathered the majority of them and brought them to their father Philip in Jerusalem. And he sent them to the blessed Athanasius, Bishop of Alexandria, where they were kept until the time of Theophilus, bishop of the same city, when, by the order of Prince Theodosius, all the shrines of the nations were destroyed. Then, after the temple of Serapis was cleansed of impurities, they were placed there, and the basilica was consecrated in honor of Saint John in place of the shrine of Serapis. Read the eleventh book of Ecclesiastical History.