John 1:31-34 NIV

31 I myself did not know him, but the reason I came baptizing with water was that he might be revealed to Israel."
32 Then John gave this testimony: "I saw the Spirit come down from heaven as a dove and remain on him.1

References for John 1:32

33 I would not have known him, except that the one who sent me to baptize with water2 told me, 'The man on whom you see the Spirit come down and remain is he who will baptize with the Holy Spirit.'3

References for John 1:33

34 I have seen and I testify that this is the Son of God."4

References for John 1:34