Luke 3:3

And he came into all the country around Jordan, proclaiming 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 3:5-6

Then Jerusalem and all Judea went out to him, and all the region round about Jordan.

Matthew 3:11

I indeed baptize you with water to repentance. But He who comes after me is mightier than I, whose sandals I am not worthy to carry. He shall baptize you with the Holy Spirit and with fire;

Mark 1:4-5

John came baptizing in the wilderness and proclaiming the baptism of repentance for the remission of sins.

John 1:28

These things were done in Bethabara beyond Jordan, where John was baptizing.

John 1:31-33

And I did not know Him, but that He be revealed to Israel, therefore I have come baptizing with water.

John 3:26

And they came to John and said to him, Rabbi, He who was with you beyond Jordan, to whom you bore witness, behold, He baptizes, and all come to Him!

Acts 13:24

John having before proclaimed the baptism of repentance to all the people of Israel, before His coming.

Acts 19:4

And Paul said, John truly baptized with the baptism of repentance, saying to the people that they should believe into Him coming after him, that is, into Jesus Christ.

Acts 22:16

And now what do you intend? Arise and be baptized and wash away your sins, calling on the name of the Lord.

Treasury of Scripture Knowledge

Summary

And he came into all the country about Jordan, preaching the baptism of repentance for the remission of sins;

For

Bible References

The country

Matthew 3:5
Then Jerusalem and all Judea went out to him, and all the region round about Jordan.
Mark 1:4
John came baptizing in the wilderness and proclaiming the baptism of repentance for the remission of sins.
John 1:28
These things were done in Bethabara beyond Jordan, where John was baptizing.
John 3:26
And they came to John and said to him, Rabbi, He who was with you beyond Jordan, to whom you bore witness, behold, He baptizes, and all come to Him!

Preaching

Matthew 3:6
And they were baptized by him in the Jordan, confessing their sins.
Mark 1:4
John came baptizing in the wilderness and proclaiming the baptism of repentance for the remission of sins.
John 1:31
And I did not know Him, but that He be revealed to Israel, therefore I have come baptizing with water.
Acts 13:24
John having before proclaimed the baptism of repentance to all the people of Israel, before His coming.
Acts 19:4
And Paul said, John truly baptized with the baptism of repentance, saying to the people that they should believe into Him coming after him, that is, into Jesus Christ.
Acts 22:16
And now what do you intend? Arise and be baptized and wash away your sins, calling on the name of the Lord.

For

Luke 1:77
to give knowledge of salvation to His people by the remission of their sins,