Isaiah 40:6-8

6 The voice of one saying, Cry. One said, What shall I cry? All flesh is grass, and all the glory of it is as the flower of the field.  7 The grass withers, the flower fades, because the breath of Yahweh blows on it; surely the people is grass.  8 The grass withers, the flower fades; but the word of our God shall stand forever.