Mark 1:4

In the desert came John who baptized, and preached a baptism of repentance for the remission of sins;

Luke 1:77

"To give to his people a knowledge of salvation Through the remission of their sins,

Matthew 3:1-2

In those days came John the Baptist preaching in the desert of Judea;

Matthew 3:6

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

Matthew 3:11

I indeed am baptizing you in water, unto repentance; but One is coming after me, mightier than I, whose sandals I am not worthy to carry. He will baptize you in the Holy Spirit and in fire.

Luke 3:2-3

during the high priesthood of Annas and Caiaphas, the word of God came to John, the son of Zachariah, in the Desert.

John 3:23

John also was baptizing in Aenon, near Salim, because there were many streams there, and people kept coming to receive baptism.

Acts 10:37

"you know the message spread throughout all Judea, beginning in Galilee, after the baptism which John preached;

Acts 13:24-25

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

Acts 19:3-4

"Into what, then, were you baptized?" he asked. And they said, "Into the baptism of John."

Acts 22:16

"'And now why do you wait? Rise and be baptized, and wash away your sins, 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
In those days came John the Baptist preaching in the desert of Judea;
Luke 3:2
during the high priesthood of Annas and Caiaphas, the word of God came to John, the son of Zachariah, in the Desert.
John 3:23
John also was baptizing in Aenon, near Salim, because there were many streams there, and people kept coming to receive baptism.
Acts 10:37
"you know the message spread throughout all Judea, beginning in Galilee, after the baptism which John preached;
Acts 13:24
"before whose coming John had already preached a baptism of repentance to all the people of Israel.
Acts 19:3
"Into what, then, were you baptized?" he asked. And they said, "Into the baptism of John."

Remission

Acts 22:16
"'And now why do you wait? Rise and be baptized, and wash away your sins, calling upon his name.'