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.’”
KJV
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.
ASV
For this is he that was spoken of through Isaiah the prophet, saying, The voice of one crying in the wilderness, Make ye ready the way of the Lord, Make his paths straight.