Matthew 3:6

"And were baptized of him in Jordan, confessing their sins."
Matthew 3:6 (KJV)

Context from Matthew 3

4

And the same John had his raiment of camel’s hair, and a leathern girdle about his loins; and his meat was locusts and wild honey.

5

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

6

And were baptized of him in Jordan, confessing their sins.

7

But when he saw many of the Pharisees and Sadducees come to his baptism, he said unto them, O generation of vipers, who hath warned you to flee from the wrath to come?

8

Bring forth therefore fruits meet for repentance: