John 1:31

And I knew him not; but that he might be made manifest to Israel, for this reason have I come baptizing with water.

Luke 1:17

And he shall go before him in the spirit and power of Elijah, to turn the hearts of fathers to children, and the disobedient to the wisdom of the righteous, to make ready a people prepared for the Lord.

Matthew 3:6

and were baptized by him in the river Jordan, confessing their sins.

Mark 1:3-5

A voice of one crying in the wilderness, Prepare the way of the Lord! Make his paths straight.

Luke 1:76-80

And you, little child, shall be called a prophet of the Most High; for you shall 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 to Galilee, to their city Nazareth.

Luke 3:3-4

And he went into all the region about the Jordan, preaching the baptism of a change of mind for the forgiveness of sins;

John 1:7

This man came for a testimony, to testify of the light, that all might believe through him.

John 1:33

And I knew him not, but he that sent me to baptize with water, he said to me, On whom you see the Spirit descend and remain on him, this is he that baptizes with the Holy Spirit.

Acts 19:4

Paul said, John indeed baptized [administered] the baptism of a change of mind, telling the people to believe on him that was to come after him, that is, on 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 knew him not, but he that sent me to baptize with water, he said to me, On whom you see the Spirit descend and remain on him, this is he that baptizes with the Holy Spirit.
Luke 1:80
And the child grew, and became strong in spirit, and was in the wilderness till the day of his manifestation to Israel.
Luke 2:39
And when they had finished all things according to the law of the Lord, they returned to Galilee, to their city Nazareth.

But

John 1:7
This man came for a testimony, to testify of the light, that all might believe through him.
Luke 1:17
And he shall go before him in the spirit and power of Elijah, to turn the hearts of fathers to children, and the disobedient to the wisdom of the righteous, to make ready a people prepared for the Lord.

Therefore

Matthew 3:6
and were baptized by him in the river Jordan, confessing their sins.
Mark 1:3
A voice of one crying in the wilderness, Prepare the way of the Lord! Make his paths straight.
Luke 3:3
And he went into all the region about the Jordan, preaching the baptism of a change of mind for the forgiveness of sins;
Acts 19:4
Paul said, John indeed baptized [administered] the baptism of a change of mind, telling the people to believe on him that was to come after him, that is, on Jesus.