I knew.

John 1:31
I myself did not know Him, but the reason I came baptizing with water was that He might be revealed to Israel."

Matthew 3:13-15
At that time Jesus came from Galilee to the Jordan to be baptized by John. . . .

the same.

John 3:5, 34
Jesus answered, "Truly, truly, I tell you, no one can enter the kingdom of God unless he is born of water and the Spirit. . . .

Matthew 3:11, 14
I baptize you with water for repentance, but after me will come One more powerful than I, whose sandals I am not worthy to carry. He will baptize you with the Holy Spirit and with fire. . . .

Mark 1:7, 8
And he began to proclaim: "After me will come One more powerful than I, the straps of whose sandals I am not worthy to stoop down and untie. . . .

Luke 3:16
John answered all of them: "I baptize you with water, but One more powerful than I will come, the straps of whose sandals I am not worthy to untie. He will baptize you with the Holy Spirit and with fire.

Acts 1:5
For John baptized with water, but in a few days you will be baptized with the Holy Spirit."

Acts 2:4
And they were all filled with the Holy Spirit and began to speak in other tongues as the Spirit enabled them.

Acts 10:44-47
While Peter was still speaking these words, the Holy Spirit fell on all who heard his message. . . .

Acts 11:15, 16
As I began to speak, the Holy Spirit fell on them, just as He had come upon us at the beginning. . . .

Acts 19:2-6
and asked them, "Did you receive the Holy Spirit when you became believers?" "No, " they answered, "we have not even heard that there is a Holy Spirit." . . .

1 Corinthians 12:13
For in one Spirit we were all baptized into one body, whether Jews or Greeks, slave or free, and we were all given one Spirit to drink.

Titus 3:5, 6
He saved us, not by the righteous deeds we had done, but according to His mercy, through the washing of new birth and renewal by the Holy Spirit. . . .