Mark 1:4

and preaching the baptism of repentance in order to the remission of sins;

Luke 1:77

to make known salvation to his people,

Matthew 3:1-2

Now in those days came John the baptist preaching in the desert part of Judea,

Matthew 3:6

and they were baptized by 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 carry: He shall baptize you with the holy Spirit and with fire.

Luke 3:2-3

and Lysanias tetrarch of Abilene, Annas and Caiaphas being high priests, the word of God came unto 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 people came to him and were baptized.

Acts 10:37

Ye know the report that was spread through all Judea, having begun from Galilee, after the baptism which John preached: concerning Jesus of Nazareth,

Acts 13:24-25

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

Acts 19:3-4

And he said unto them, Into what then were ye baptized? And they said, Into the baptism of John.

Acts 22:16

And now why shouldst thou delay? Arise and be baptized, and wash away thy sins, calling upon 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
Now in those days came John the baptist preaching in the desert part of Judea,
Luke 3:2
and Lysanias tetrarch of Abilene, Annas and Caiaphas being high priests, the word of God came unto 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 people came to him and were baptized.
Acts 10:37
Ye know the report that was spread through all Judea, having begun from Galilee, after the baptism which John preached: concerning Jesus of Nazareth,
Acts 13:24
John having preached before his coming the baptism of repentance to all the people of Israel.
Acts 19:3
And he said unto them, Into what then were ye baptized? And they said, Into the baptism of John.

Remission

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