John 1:7

This man came as a witness, to testify of the Light, that all through him might believe.

John 1:19

And this is the testimony of John, when the Jews sent priests and Levites from Jerusalem to ask him: Who are you?

Acts 19:4

And Paul said: John immersed with the immersion of repentance, saying to the people, that they must believe on him who should come after him, that is, on the Christ, Jesus.

John 1:9

He was the true Light, which, coming into the world, gives light to every man.

John 1:12

But as many as received him, to them he gave the privilege of be coming the children of God, even to those who believe on his name;

John 1:15

John testified of him, and cried, saying: This is he of whom I said: He that comes after me, is now before me, for he existed before me.

John 1:26-27

John answered them, saying: I immerse in water; but there stands one among you whom you know not.

John 1:32-34

And John testified, saying: I saw the Spirit descending from heaven like a dove, and it remained on him.

John 1:36

And looking on Jesus as he walked, he said: Be hold the Lamb of God.

John 3:26-36

And they came to John, and said to him: Rabbi, he who was with you beyond the Jordan, to whom you bore testimony, behold, he immerses, and all are going to him.

John 5:33-35

You sent to John, and he bore testimony to the truth.

Ephesians 3:9

and enlighten all men with respect to the plan of the mystery, which was concealed from the ages in God, who created all things;

1 Timothy 2:4

who is willing that all men should be saved, and come to the knowledge of the truth.

Titus 2:11

For the grace of God, which brings salvation to all men, has appeared,

2 Peter 3:9

The Lord does not delay concerning his promise, as some men count delay, but he is long-suffering toward us, not wishing that any should perish, but that all should come to repentance.

Treasury of Scripture Knowledge

Summary

The same came for a witness, to bear witness of the Light, that all men through him might believe.

General references

Bible References

A witness

John 1:19
And this is the testimony of John, when the Jews sent priests and Levites from Jerusalem to ask him: Who are you?
John 3:26
And they came to John, and said to him: Rabbi, he who was with you beyond the Jordan, to whom you bore testimony, behold, he immerses, and all are going to him.
John 5:33
You sent to John, and he bore testimony to the truth.
Acts 19:4
And Paul said: John immersed with the immersion of repentance, saying to the people, that they must believe on him who should come after him, that is, on the Christ, Jesus.

That

John 1:9
He was the true Light, which, coming into the world, gives light to every man.
John 3:26
And they came to John, and said to him: Rabbi, he who was with you beyond the Jordan, to whom you bore testimony, behold, he immerses, and all are going to him.
Ephesians 3:9
and enlighten all men with respect to the plan of the mystery, which was concealed from the ages in God, who created all things;
1 Timothy 2:4
who is willing that all men should be saved, and come to the knowledge of the truth.
Titus 2:11
For the grace of God, which brings salvation to all men, has appeared,
2 Peter 3:9
The Lord does not delay concerning his promise, as some men count delay, but he is long-suffering toward us, not wishing that any should perish, but that all should come to repentance.

General references

Mark 11:30
Was the immersion of John from heaven, or from men? answer me.
Acts 13:24
John having first preached, before his coming, the immersion of repentance to all the people of Israel.