Luke 3:3

And he came into all the region around the Jordan, preaching an immersion of repentance for remission of sins,

Luke 1:77

to give knowledge of salvation to his people in the remission of their sins,

Matthew 3:5-6

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

Matthew 3:11

I indeed immerse you in water for repentance, but he who comes after me is mightier than I, whose shoes I am not worthy to bear. He will immerse you in a Holy Spirit.

Mark 1:4-5

It came to pass, that John was immersing in the wilderness and preaching an immersion of repentance for remission of sins.

John 1:28

These things occurred in Bethany beyond the Jordan where John was immersing.

John 1:31-33

And I had not known him, but that he would be made known to Israel. Because of this I came immersing in water.

John 3:26

And they came to John, and said to him, Rabbi, he who was with thee beyond the Jordan, about whom thou have testified, behold, this man immerses, and all men come to him.

Acts 13:24

John having earlier proclaimed, before his coming presence, the immersion of repentance to Israel.

Acts 19:4

And Paul said, John indeed immersed an immersion of repentance, saying to the people that they should believe in him who was coming after him, that is, in Jesus, the Christ.

Acts 22:16

And now what is it going to be? Having arisen, immerse and wash away thy 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, and all the region of the Jordan went out to him,
Mark 1:4
It came to pass, that John was immersing in the wilderness and preaching an immersion of repentance for remission of sins.
John 1:28
These things occurred in Bethany beyond the Jordan where John was immersing.
John 3:26
And they came to John, and said to him, Rabbi, he who was with thee beyond the Jordan, about whom thou have testified, behold, this man immerses, and all men come to him.

Preaching

Matthew 3:6
and they were immersed by him in the Jordan, confessing their sins.
Mark 1:4
It came to pass, that John was immersing in the wilderness and preaching an immersion of repentance for remission of sins.
John 1:31
And I had not known him, but that he would be made known to Israel. Because of this I came immersing in water.
Acts 13:24
John having earlier proclaimed, before his coming presence, the immersion of repentance to Israel.
Acts 19:4
And Paul said, John indeed immersed an immersion of repentance, saying to the people that they should believe in him who was coming after him, that is, in Jesus, the Christ.
Acts 22:16
And now what is it going to be? Having arisen, immerse and wash away thy sins, calling on the name of the Lord.

For

Luke 1:77
to give knowledge of salvation to his people in the remission of their sins,