Mark 1:3
"The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight."
Cross References (ranked by relevance)
Matthew 3:3
12
For this is he that was spoken of by the prophet Esaias, saying, The voice of one crying in the wilderness, Prepare ye the way of the Lord, make his paths straight.
John 1:15
John bare witness of him, and cried, saying, This was he of whom I spake, He that cometh after me is preferred before me: for he was before me.