Mark 6:17
For Herod himself had sent men, arrested John, and bound him in prison on account of Herodias, his brother Philip's wife, because Herod had married her.
Matthew 11:2
Now when John heard in prison about the deeds Christ had done, he sent his disciples to ask a question:
Luke 3:19-20
But when John rebuked Herod the tetrarch because of Herodias, his brother's wife, and because of all the evil deeds that he had done,
Matthew 4:12
Now when Jesus heard that John had been imprisoned, he went into Galilee.
Matthew 14:3-12
For Herod had arrested John, bound him, and put him in prison on account of Herodias, his brother Philip's wife,
Luke 3:1
In the fifteenth year of the reign of Tiberius Caesar, when Pontius Pilate was governor of Judea, and Herod was tetrarch of Galilee, and his brother Philip was tetrarch of the region of Iturea and Trachonitis, and Lysanias was tetrarch of Abilene,