Matthew 3:9 (KJV)

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.

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

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

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?

Bring forth therefore fruits meet for repentance:

And now also the axe is laid unto the root of the trees: therefore every tree which bringeth not forth good fruit is hewn down, and cast into the fire.

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:

Whose fan is in his hand, and he will throughly purge his floor, and gather his wheat into the garner; but he will burn up the chaff with unquenchable fire.

Then cometh Jesus from Galilee to Jordan unto John, to be baptized of him.

But John forbad him, saying, I have need to be baptized of thee, and comest thou to me?