John 1:31

And I knew him not: though that he might be manifested to Israel, therefore am I come baptising with water.

Luke 1:17

And he shall go forth before him in the spirit and power of Elias, to convert the hearts of fathers with their children, and the disobedient to the wisdom of the just; to prepare a people ready for the Lord.

Matthew 3:6

and were baptized by him in Jordan, on making confession of their sins.

Mark 1:3-5

The voice of one crying in the wilderness, Prepare the way of the Lord, make his paths strait."

Luke 1:76-80

And thou, child, shalt be called the prophet of the Most High; for thou shalt go before the face of the Lord to prepare his ways;

Luke 2:39-42

And when they had finished all things according to the law of the Lord, they returned into Galilee, into their own city Nazareth.

Luke 3:3-4

and he came into all the country on the confines of Jordan, preaching the baptism of repentance for the remission of sins;

John 1:7

He came for a witness, that he might bear testimony concerning the Light, that all men through him might believe.

John 1:33

And I did not know him: but he that sent me baptising with water, he said to me, Upon whomsoever thou shalt see the Spirit descending as a dove, and resting upon him, that is he who baptiseth with the Holy Ghost.

Acts 19:4

Then said Paul, John indeed baptised with the baptism of repentance, saying to the people, That they should believe on him who was coming after him, that is, in Christ Jesus.

Treasury of Scripture Knowledge

Summary

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

Bible References

I knew

John 1:33
And I did not know him: but he that sent me baptising with water, he said to me, Upon whomsoever thou shalt see the Spirit descending as a dove, and resting upon him, that is he who baptiseth with the Holy Ghost.
Luke 1:80
And the child grew, and became mighty in spirit, and was in the deserts until the days of his public exhibition to Israel.
Luke 2:39
And when they had finished all things according to the law of the Lord, they returned into Galilee, into their own city Nazareth.

But

John 1:7
He came for a witness, that he might bear testimony concerning the Light, that all men through him might believe.
Luke 1:17
And he shall go forth before him in the spirit and power of Elias, to convert the hearts of fathers with their children, and the disobedient to the wisdom of the just; to prepare a people ready for the Lord.

Therefore

Matthew 3:6
and were baptized by him in Jordan, on making confession of their sins.
Mark 1:3
The voice of one crying in the wilderness, Prepare the way of the Lord, make his paths strait."
Luke 3:3
and he came into all the country on the confines of Jordan, preaching the baptism of repentance for the remission of sins;
Acts 19:4
Then said Paul, John indeed baptised with the baptism of repentance, saying to the people, That they should believe on him who was coming after him, that is, in Christ Jesus.