Isaiah 40:3-5
A voice of one calling: "Prepare the way for the LORD in the wilderness; make a straight highway for our God in the desert. . . .

Matthew 3:3
This is he who was spoken of through the prophet Isaiah: "A voice of one calling in the wilderness, 'Prepare the way for the Lord, make straight paths for Him.'"

Luke 3:4-6
as it is written in the book of the words of Isaiah the prophet: "A voice of one calling in the wilderness, 'Prepare the way for the Lord; make straight paths for Him.' . . .

John 1:15, 19-34
John testified concerning Him. He cried out, saying, "This is He of whom I said, 'He who comes after me has surpassed me because He was before me.'" . . .

John 3:28-36
You yourselves can testify that I said, 'I am not the Christ, but am sent ahead of Him.' . . .