Isaiah 40:3-6

ASV(i) 3 The voice of one that crieth, Prepare ye in the wilderness the way of Jehovah; make level in the desert a highway for our God. 4 Every valley shall be exalted, and every mountain and hill shall be made low; and the uneven shall be made level, and the rough places a plain: 5 and the glory of Jehovah shall be revealed, and all flesh shall see it together; for the mouth of Jehovah hath spoken it.
6 The voice of one saying, Cry. And one said, What shall I cry? All flesh is grass, and all the goodliness thereof is as the flower of the field.