... the word of God came to John, the son of Zacharias, in the wilderness. And he came into all the district around the Jordan, preaching a baptism of repentance for the forgiveness of sins; as it is written in the book of the words of Isaiah the prophet:
A voice is calling,
"Clear the way for the LORD in the wilderness;
make smooth in the desert a highway for our God.
Let every valley be lifted up,
And every mountain and hill be made low;
And let the rough ground become a plain,
And the rugged terrain a broad valley;
Then the glory of the LORD will be revealed,
And all flesh will see it together;
For the mouth of the LORD has spoken."
Luke 3:2-6 & Isaiah 40:3-5