John 21:24

This is the disciple who is testifying to these things and wrote these things, and we know that his testimony is true.

John 19:35

And he who has seen has testified, and his testimony is true; and he knows that he is telling the truth, so that you also may believe.

3 John 1:12

Demetrius has received a good testimony from everyone, and from the truth itself; and we add our testimony, and you know that our testimony is true.

John 15:27

and you will testify also, because you have been with Me from the beginning.

1 John 1:1-2

What was from the beginning, what we have heard, what we have seen with our eyes, what we have looked at and touched with our hands, concerning the Word of Life—

1 John 5:6

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. It is the Spirit who testifies, because the Spirit is the truth.

Treasury of Scripture Knowledge

Summary

This is the disciple which testifieth of these things, and wrote these things: and we know that his testimony is true.

Bible References

We know

John 19:35
And he who has seen has testified, and his testimony is true; and he knows that he is telling the truth, so that you also may believe.
1 John 1:1
What was from the beginning, what we have heard, what we have seen with our eyes, what we have looked at and touched with our hands, concerning the Word of Life—
1 John 5:6
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. It is the Spirit who testifies, because the Spirit is the truth.
3 John 1:12
Demetrius has received a good testimony from everyone, and from the truth itself; and we add our testimony, and you know that our testimony is true.

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