'Testifies' in the Bible

He testifies to what He has seen and heard, yet no one accepts His testimony.

There is Another who testifies about Me, and I know that the testimony He gives about Me is valid.

I am the One who testifies about Myself, and the Father who sent Me testifies about Me.”

This is the disciple who testifies to these things and who wrote them down. We know that his testimony is true.