James 1:10-11

and the rich brother rejoice in his being on a level with the poor, because the rich will fade away like the flower of the grass.

1 Peter 1:24

For "All human life is just like grass, and all its glory like the flower of grass. The grass dries up; the flowers drop off.

Treasury of Scripture Knowledge

Summary

Therefore their inhabitants were of small power, they were dismayed and confounded; they were as the grass of the field, and as the green herb, as the grass on the housetops, and as corn blasted before it be grown up.

Bible References

They were

James 1:10
and the rich brother rejoice in his being on a level with the poor, because the rich will fade away like the flower of the grass.
1 Peter 1:24
For "All human life is just like grass, and all its glory like the flower of grass. The grass dries up; the flowers drop off.