John 3:13

3:13 No one has ascended into heaven except the one who descended from heaven – the Son of Man.

John 3:32-34

3:32 He testifies about what he has seen and heard, but no one accepts his testimony. 3:33 The one who has accepted his testimony has confirmed clearly that God is truthful. 3:34 For the one whom God has sent speaks the words of God, for he does not give the Spirit sparingly.