John 21:24
This is the disciple who testifies of these things and wrote these things. And we know that his testimony is true.
John 19:35
And he who saw bore record, and his record is true. And he knows that he speaks true, so that you might believe.
3 John 1:12
Demetrius has good report by all, and by the truth itself. And we also bear witness, and you know that our witness is true.
John 15:27
And you also shall bear witness, because you have been with Me from the beginning.
1 John 1:1-2
That which was from the beginning, which we have heard, which we have seen with our eyes, which we have looked upon, and our hands have handled, concerning the Word of Life,
1 John 5:6
This is He who came through water and blood, Jesus Christ, not by water only, but by the water and blood. And the Spirit is He who bears witness, because the Spirit is the truth.