Isaiah 40:3-5

3 A voice cries out: In the desert prepare the way of the LORD! Make straight in the wasteland a highway for our God!

4 Every valley shall be filled in, every mountain and hill shall be made low; The rugged land shall be made a plain, the rough country, a broad valley.

5 Then the glory of the LORD shall be revealed, and all mankind shall see it together; for the mouth of the LORD has spoken.