1 Peter 1:24 Niv,nkjv

Isaiah 40:6-8 NIV
A voice says, “Cry out.” And I said, “What shall I cry?” “All people are like grass, and all their faithfulness is like the flowers of the field. The grass withers and the flowers fall, because the breath of the Lord blows on them. Surely the people are grass. The grass withers and the flowers fall, but the word of our God endures forever. ”

James 1:10-11 NIV
But the rich should take pride in their humiliation—since they will pass away like a wild flower. For the sun rises with scorching heat and withers the plant; its blossom falls and its beauty is destroyed. In the same way, the rich will fade away even while they go about their business.

James 4:14 NIV
Why, you do not even know what will happen tomorrow. What is your life? You are a mist that appears for a little while and then vanishes.

Psalm 103:15 NIV
The life of mortals is like grass, they flourish like a flower of the field;