Luke 3:3

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

Luke 1:77

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

Matthew 3:5-6

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

Matthew 3:11

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

Mark 1:4-5

John did baptize in the wilderness, and preach the baptism of repentance for the remission of sins.

John 1:28

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

John 1:31-33

And I knew him not: but that he should be made manifest to Israel, therefore am I come baptizing with water.

John 3:26

And they came unto John, and said unto him, Rabbi, he that was with you beyond Jordan, to whom you bear witness, behold, the same baptizes, and all men come to him.

Acts 13:24

When John had first preached before his coming the baptism of repentance to all the people of Israel.

Acts 19:4

Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him who should come after him, that is, on Christ Jesus.

Acts 22:16

And now why do you tarry? 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 went out to him Jerusalem, and all Judea, and all the region round about Jordan,
Mark 1:4
John did baptize in the wilderness, and preach the baptism of repentance for the remission of sins.
John 1:28
These things were done in Bethany beyond Jordan, where John was baptizing.
John 3:26
And they came unto John, and said unto him, Rabbi, he that was with you beyond Jordan, to whom you bear witness, behold, the same baptizes, and all men come to him.

Preaching

Matthew 3:6
And were baptized by him in the Jordan, confessing their sins.
Mark 1:4
John did baptize in the wilderness, and preach the baptism of repentance for the remission of sins.
John 1:31
And I knew him not: but that he should be made manifest to Israel, therefore am I come baptizing with water.
Acts 13:24
When John had first preached before his coming the baptism of repentance to all the people of Israel.
Acts 19:4
Then said Paul, John verily baptized with the baptism of repentance, saying unto the people, that they should believe on him who should come after him, that is, on Christ Jesus.
Acts 22:16
And now why do you tarry? 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 unto his people by the remission of their sins,