John 1:31

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

Luke 1:17

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

Matthew 3:6

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

Mark 1:3-5

The voice of one crying in the wilderness, Make ready the way of the Lord, make his paths straight.

Luke 1:76-80

And you, child, shall be called the prophet of the Most High; for you shall go before the face of the Lord, to make ready his ways,

Luke 2:39-42

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

Luke 3:3-4

And he came into all the country about the Jordan, preaching the immersion of repentance in order to the remission of sins;

John 1:7

This man came as a witness, to testify of the Light, that all through him might believe.

John 1:33

And I knew him not; but he that sent me to immerse in water, said to me, On whom you shall see the Spirit descending and remaining, this is he that immerses in the Holy Spirit.

Acts 19:4

And Paul said: John immersed with the immersion of repentance, saying to the people, that they must believe on him who should come after him, that is, on the 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 knew him not; but he that sent me to immerse in water, said to me, On whom you shall see the Spirit descending and remaining, this is he that immerses in the Holy Spirit.
Luke 1:80
And the child grew and became strong in spirit; and he was in the deserts till the day of his manifestation to Israel.
Luke 2:39
And when they had performed all things according to the law of the Lord, they returned to Galilee, to their own city Nazareth.

But

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

Therefore

Matthew 3:6
and were immersed by him in the Jordan, confessing their sins.
Mark 1:3
The voice of one crying in the wilderness, Make ready the way of the Lord, make his paths straight.
Luke 3:3
And he came into all the country about the Jordan, preaching the immersion of repentance in order to the remission of sins;
Acts 19:4
And Paul said: John immersed with the immersion of repentance, saying to the people, that they must believe on him who should come after him, that is, on the Christ, Jesus.