Mark 1:4

John the Immerser came, in the wilderness, proclaiming an immersion of repentance for remission of sins;

Luke 1:77

Giving a knowledge of salvation unto his people, by a remission of their sins.

Matthew 3:1-2

Now, in those days, came John the Immerser, proclaiming in the wilderness of Judaea;

Matthew 3:6

and were being immersed in the Jordan river, by him, openly confessing their sins.

Matthew 3:11

I, indeed, am immersing you, in water, unto repentance, - but, he who, after me, cometh is, mightier than I, whose, sandals, I am not worthy to bear, he, will immerse you, in Holy Spirit and fire:

Luke 3:2-3

in the High-priesthood of Annas and Caiaphas, came a word of God unto John the son, of Zechariah, in rue desert;

John 3:23

And John also was immersing in Aenon, near to him, because, many waters, were there; and they were coming, and being immersed; -

Acts 10:37

Ye yourselves, know what hath come to pass throughout the whole of Judaea, beginning from Galilee, after the immersion which John proclaimed, respecting Jesus who was of Nazareth: -

Acts 13:24-25

John, beforehand proclaiming, before the face of his coming in, an immersion of repentance, unto all the people of Israel.

Acts 19:3-4

And he said - Into what, then, were ye immersed? And, they, said - Unto John's immersion.

Acts 22:16

And, now, what art thou going to do? Arise, and get thyself immersed, and have thy sins bathed away, calling upon his name.

Treasury of Scripture Knowledge

Summary

John did baptize in the wilderness, and preach the baptism of repentance for the remission of sins.

Remission

Bible References

Did

Matthew 3:1
Now, in those days, came John the Immerser, proclaiming in the wilderness of Judaea;
Luke 3:2
in the High-priesthood of Annas and Caiaphas, came a word of God unto John the son, of Zechariah, in rue desert;
John 3:23
And John also was immersing in Aenon, near to him, because, many waters, were there; and they were coming, and being immersed; -
Acts 10:37
Ye yourselves, know what hath come to pass throughout the whole of Judaea, beginning from Galilee, after the immersion which John proclaimed, respecting Jesus who was of Nazareth: -
Acts 13:24
John, beforehand proclaiming, before the face of his coming in, an immersion of repentance, unto all the people of Israel.
Acts 19:3
And he said - Into what, then, were ye immersed? And, they, said - Unto John's immersion.

Remission

Acts 22:16
And, now, what art thou going to do? Arise, and get thyself immersed, and have thy sins bathed away, calling upon his name.