Mark 1:3
"The voice of one crying in the wilderness: 'Prepare the way of the Lord; make his paths straight.'"
Matthew 3:3
For this is he who was spoken of by the prophet Isaiah when he said, "The voice of one crying in the wilderness: Prepare the way of the Lord, make his paths straight."
Luke 3:4-6
As it is written in the book of the words of Isaiah the prophet, "The voice of one crying in the wilderness: 'Prepare the way of the Lord, make his paths straight.
John 1:15
John bore witness of him and cried out, saying, "This was he of whom I said, 'He who comes after me ranks before me, for he was before me.'"
John 3:28-36
You yourselves bear me witness, that I said, 'I am not the Christ,' but I have been sent before him.
John 1:19-34
Now this is the testimony of John, when the Jews sent priests and Levites from Jerusalem to ask him, "Who are you?"