Mark 1:4

accordingly, John baptized in the desart, and preach'd the baptism of repentance, for the remission of sins.

Luke 1:77

by acquainting his people how they may be saved by the remission of their sins,

Matthew 3:1-2

At that time appeared John the Baptist, preaching in the wilderness of Judea,

Matthew 3:6

and having confess'd their sins, they were baptized by him in Jordan.

Matthew 3:11

I indeed baptize you with water to lead you to repentance; but he that cometh after me, is my superiour, whose shoes I am not worthy to carry: he shall baptize you with the effusion of the holy Ghost, in the appearance of fire:

Luke 3:2-3

under the pontificate of Annas and Caiaphas, JOHN, the son of Zacharias, received his divine commission in the wilderness.

John 3:23

and baptized, while John was likewise baptizing in Enon, near Salim, it being a place abounding with water: so that people came to be baptized there.

Acts 10:37

you know, how his fame spread from Galilee through all Judea, after the baptism which John had preach'd:

Acts 13:24-25

before his appearance, John had preach'd the baptism of repentance to all the people of Israel.

Acts 19:3-4

what baptism then, said he, did you receive? they replied, the baptism of John.

Acts 22:16

why should you now delay? arise, be baptized, and cleansed from your sins, by invoking 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
At that time appeared John the Baptist, preaching in the wilderness of Judea,
Luke 3:2
under the pontificate of Annas and Caiaphas, JOHN, the son of Zacharias, received his divine commission in the wilderness.
John 3:23
and baptized, while John was likewise baptizing in Enon, near Salim, it being a place abounding with water: so that people came to be baptized there.
Acts 10:37
you know, how his fame spread from Galilee through all Judea, after the baptism which John had preach'd:
Acts 13:24
before his appearance, John had preach'd the baptism of repentance to all the people of Israel.
Acts 19:3
what baptism then, said he, did you receive? they replied, the baptism of John.

Remission

Acts 22:16
why should you now delay? arise, be baptized, and cleansed from your sins, by invoking the name of the Lord.