John 21:24
This is the disciple who testifieth of these things, and wrote these things: and we know that his testimony is true.
John 19:35
he that relates this, was an eye-witness of it, and his relation is true: and he is so assured, what he says is true, that you may rely upon it.
3 John 1:12
Demetrius has the applauses of all men, and the testimony of his own virtue: we likewise certify in his behalf, and you know that our testimonial deserves credit.
John 15:27
and ye also shall bear witness, because ye have been with me from the beginning.
1 John 1:1-2
Concerning the Logos, the author of Life, we declare what was from the beginning, what we have heard, what we have seen with our eyes, what we have consider'd, and what has been the object of our touch.
1 John 5:6
it appear'd by the water, and by the blood, who he was, even Jesus the Messiah; not by the water only, but by the water and by the blood: besides, the spirit is a witness too, now the spirit is truth itself.