Mark 1:4

John the Baptizer appeared in the wilderness, preaching a baptism of repentance for the remission of sins.

Luke 1:77

to give knowledge of salvation to his people in the remission of their sins

Matthew 3:1-2

In those days came John the Baptist, preaching in the wilderness of Judaea,

Matthew 3:6

and were baptized by him in the river Jordan, confessing their sins.

Matthew 3:11

I indeed baptize you in water, for repentance; but he that cometh after me is mightier than I, whose sandals I am not worthy to bear; he will baptize you in the Holy Spirit and in fire.

Luke 3:2-3

when Annas and Caiaphas were highpriests, the word of God came to John, the son of Zachariah, in the wilderness.

John 3:23

And John also was baptizing in Aenon, near Salim, because there was much water there; and they came, and were baptized.

Acts 10:37

Ye yourselves know what was spoken of through the whole of Judaea, beginning from Galilee after the baptism which John preached,

Acts 13:24-25

before whose coming forward John had first preached a baptism of repentance to all the people of Israel.

Acts 19:3-4

And he said, Into what then were ye baptized? And they said, Into Johns baptism.

Acts 22:16

And now why dost thou delay? Arise, and be baptized, and wash away thy sins, calling on 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
In those days came John the Baptist, preaching in the wilderness of Judaea,
Luke 3:2
when Annas and Caiaphas were highpriests, the word of God came to John, the son of Zachariah, in the wilderness.
John 3:23
And John also was baptizing in Aenon, near Salim, because there was much water there; and they came, and were baptized.
Acts 10:37
Ye yourselves know what was spoken of through the whole of Judaea, beginning from Galilee after the baptism which John preached,
Acts 13:24
before whose coming forward John had first preached a baptism of repentance to all the people of Israel.
Acts 19:3
And he said, Into what then were ye baptized? And they said, Into Johns baptism.

Remission

Acts 22:16
And now why dost thou delay? Arise, and be baptized, and wash away thy sins, calling on his name.