1 Peter 1:23-25

23 having been born again, not of corruptible seed, but of incorruptible, through the word of God, which lives and remains forever.  24 For,  "All flesh is like grass,  And all of man's glory like the flower in the grass.  The grass withers, and its flower falls;

25 But the Lord's word endures forever."  This is the word of good news which was preached to you.

Isaiah 40:8

8 The grass withers, the flower fades; but the word of our God shall stand forever.