John 1:7

1:7 He came as a witness to testify about the light, so that everyone might believe through him.

John 3:32

3:32 He testifies about what he has seen and heard, but no one accepts his testimony.

John 5:34

5:34 (I do not accept human testimony, but I say this so that you may be saved.)

John 8:13

8:13 So the Pharisees objected, “You testify about yourself; your testimony is not true!”

John 8:17

8:17 It is written in your law that the testimony of two men is true.