Passage cross-references.

Even as the testimony of Christ was confirmed in you:

And he that saw it bare record, and his record is true: and he knoweth that he saith true, that ye might believe.

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

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, of the Word of life;

And the dragon was wroth with the woman, and went to make war with the remnant of her seed, which keep the commandments of God, and have the testimony of Jesus Christ.

I John, who also am your brother, and companion in tribulation, and in the kingdom and patience of Jesus Christ, was in the isle that is called Patmos, for the word of God, and for the testimony of Jesus Christ.

Write the things which thou hast seen, and the things which are, and the things which shall be hereafter;

The people therefore that was with him when he called Lazarus out of his grave, and raised him from the dead, bare record.

But rise, and stand upon thy feet: for I have appeared unto thee for this purpose, to make thee a minister and a witness both of these things which thou hast seen, and of those things in the which I will appear unto thee;

For there are three that bear record in heaven, the Father, the Word, and the Holy Ghost: and these three are one. …

And when he had opened the fifth seal, I saw under the altar the souls of them that were slain for the word of God, and for the testimony which they held:

For we cannot but speak the things which we have seen and heard.

And I, brethren, when I came to you, came not with excellency of speech or of wisdom, declaring unto you the testimony of God.

And we have seen and do testify that the Father sent the Son to be the Saviour of the world.

And John bare record, saying, I saw the Spirit descending from heaven like a dove, and it abode upon him.

Verily, verily, I say unto thee, We speak that we do know, and testify that we have seen; and ye receive not our witness.

For thou shalt be his witness unto all men of what thou hast seen and heard.

Demetrius hath good report of all men, and of the truth itself: yea, and we also bear record; and ye know that our record is true.

And they overcame him by the blood of the Lamb, and by the word of their testimony; and they loved not their lives unto the death.