“But Herod the tetrarch, being reproved by him for Herodias his brother Philip's wife, and for all the evils which Herod had done,”
King James Version (KJV)
3:20 He shut up John - This circumstance, though it happened after, is here mentioned before our Lord's baptism, that his history (that of John being concluded) may then follow without any interruption.
3:21 Jesus praying, the heaven was opened - It is observable, that the three voices from heaven, see #Lu 9:29|,35; John 12:28; by which the Father bore witness to Christ, were pronounced either while he was praying, or quickly after it. #Mt 3:13|; Mr 1:9.
Lu 3:19,20 But Herod the tetrarch. See notes on Mt 14:1-12 Mr 6:14-18.