Mark 1:4

John baptized in the wilderness and preached the baptism of repentance, for the remission of sins.

Luke 1:77

To give knowledge of salvation to his people, by the remission of their sins,

Matthew 3:1-2

In those days cometh John the Baptist, preaching in the wilderness of Judea.

Matthew 3:6

And were baptized of him in Jordan, confessing their Sins.

Matthew 3:11

I indeed baptize you with water unto repentance; but he that cometh after me is mightier than I; whose shoes I am not worthy to bear; he shall baptize you with the Holy Ghost and with fire:

Luke 3:2-3

Annas being the high priest and Caiaphas, the word of God came to John, the son of Zacharias, in the wilderness.

John 3:23

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

Acts 10:37

Ye know the word which was published through all Judea, beginning from Galilee, after the baptism which John preached:

Acts 13:24-25

John having first preached before his coming, the baptism of repentance to all the people of Israel.

Acts 19:3-4

He said to them, Into what then were ye baptized? And they said, Into John's baptism.

Acts 22:16

And now, why tarriest thou? Arise and be baptized, and wash away thy sins, calling on the name of the Lord.

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 cometh John the Baptist, preaching in the wilderness of Judea.
Luke 3:2
Annas being the high priest and Caiaphas, the word of God came to John, the son of Zacharias, in the wilderness.
John 3:23
And John also was baptizing in Enon, near Salim, because there was much water there; and they came and were baptized.
Acts 10:37
Ye know the word which was published through all Judea, beginning from Galilee, after the baptism which John preached:
Acts 13:24
John having first preached before his coming, the baptism of repentance to all the people of Israel.
Acts 19:3
He said to them, Into what then were ye baptized? And they said, Into John's baptism.

Remission

Acts 22:16
And now, why tarriest thou? Arise and be baptized, and wash away thy sins, calling on the name of the Lord.