Matthew 3:3 & Isaiah 40:3
Matt 3:1 (NIV) In those days John the Baptist came, preaching in the Desert of Judea 2 and saying, "Repent, for the kingdom of heaven is near." 3 This is he who was spoken of through the prophet Isaiah: "A voice of one calling in the desert, 'Prepare the way for the Lord, make straight paths for him.'" {[3] Isaiah 40:3}
Isa 40:3 (NIV) A voice of one calling: "In the desert prepare the way for the LORD; make straight in the wilderness a highway for our God."