'Testifies' in the Bible

What he has seen and heard, this he testifies, and no one accepts his testimony.

There is another who testifies about me, and I know that the testimony which he testifies about me is true.

I am the one who testifies concerning myself, and the Father who sent me testifies concerning me."

except that the Holy Spirit testifies to me in town [after town], saying that bonds and persecutions await me.

And the Holy Spirit also testifies to us, for after saying,

This is the one who came by water and blood--Jesus Christ, not with the water only, but with the water and with the blood. And the Spirit is the one who testifies, because the Spirit is the truth.

The one who testifies about these [things] says, "Yes, I am coming quickly!" Amen! Come, Lord Jesus!