Of John his father Zechariah said:
“And you, child, will be called the prophet of the Most High; for you will go before the Lord to prepare his ways”.
Luke 1.76.

John said:
"I baptize you with water for repentance, but one who is more powerful than I is coming after me; I am not worthy to carry his sandals. He will baptize you with the Holy Spirit and fire.”
Matthew 3.11.

And of Jesus he said:
This is he of whom I said, 'After me comes a man who ranks ahead of me because he was before me.' I myself did not know him; but I came baptizing with water for this reason, that he might be revealed to Israel."
John 1.30