Behold, I am sending My messenger, and He will clear the way before Me. And the Lord whom you are seeking shall suddenly come to His temple, even the Angel of the Covenant, in whom you delight. Behold, He comes, says Jehovah of Hosts.
And he will go ahead before Him in the spirit and power of Elijah “to turn the hearts of fathers to their children,” and disobedient ones to the wisdom of the just, to make ready a people having been prepared for the Lord. Mal. 4:5, 6
And I did not know Him, but the One having sent me to baptize in water, that One said to me, On whomever you see the Spirit coming down and abiding on Him, this is the One baptizing in the Holy Spirit.
And Paul said, John indeed baptized with a baptism of repentance, saying to the people that they should believe into the One coming after him, that is, into the Christ, Jesus.