For this is the one about whom it has been written: “Behold, I send out My messenger before Your face, who shall prepare Your way before You.” Mal. 3:1
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.
Truly I say to you, There has not arisen among those born of a woman any greater than John the Baptist. But the least in the kingdom of Heaven is greater than he is.
For this is he spoken of by Isaiah the prophet, saying: “The voice of one crying in the deserted place: Prepare the way of the Lord! Make His paths straight!” Isa. 40:3