“Now when all the people were baptized, it came to pass, that Jesus also being baptized, and praying, the heaven was opened,”
King James Version (KJV)
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 3:21,22 Jesus also being baptized. See notes on Mt 3:13-17 Mr 1:9-11.