John 3:24
John had not yet been thrown into prison.
Matthew 4:12
Jesus heard that John had been arrested. So Jesus withdrew to Galilee.
Matthew 14:3
Herod locked John in prison to please Herodias, his brother Philip's wife.
Mark 6:17
For Herod captured John and locked him in prison for the sake of Herodias his wife. She was his brother Philip's wife before he married her.
Luke 3:19-20
John reproved Herod the tetrarch for all the evil things he had done for he took his brother Herodias' wife.
Luke 9:7-9
Herod the ruler of Galilee heard of all that was done and was very perplexed (confused) (skeptical). Some said John the Baptist was raised from the dead and that he did it.