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 to 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 cometh after me is mightier than I; whose shoes I am not worthy to bear; he shall baptize you with the Holy Ghost and with fire:

Mark 1:4-5

John baptized in the wilderness and preached 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 knew him not, but that he might be manifested to Israel, therefore am I come baptizing with water.

John 3:26

And they came to John, and said to him, Rabbi, he that was with thee beyond Jordan, to whom thou gavest testimony, behold he baptizeth, and all men come to him.

Acts 13:24

John having first preached before his coming, the baptism of repentance to all the people of Israel.

Acts 19:4

And Paul said, John baptized with the baptism of repentance, telling the people to believe on him that was to come after him, that is on Jesus.

Acts 22:16

And now, why tarriest thou? Arise and be baptized, 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 went out to him Jerusalem and all Judea, and all the region round about Jordan,
Mark 1:4
John baptized in the wilderness and preached 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 that was with thee beyond Jordan, to whom thou gavest testimony, behold he baptizeth, and all men come to him.

Preaching

Matthew 3:6
And were baptized of him in Jordan, confessing their Sins.
Mark 1:4
John baptized in the wilderness and preached the baptism of repentance, for the remission of sins.
John 1:31
And I knew him not, but that he might be manifested to Israel, therefore am I come baptizing with water.
Acts 13:24
John having first preached before his coming, the baptism of repentance to all the people of Israel.
Acts 19:4
And Paul said, John baptized with the baptism of repentance, telling the people to believe on him that was to come after him, that is on Jesus.
Acts 22:16
And now, why tarriest thou? Arise and be baptized, and wash away thy 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,