39:9Is he who worships devoutly during the watches of the night, prostrating himself and standing up, mindful of the Hereafter, and placing his hope in the mercy of his Lord? Say, “Are those who know and those who do not know equal?” Only those possessed of reason will remember.

39:21Have you not considered how God sends down water from the sky, then He makes it flow into underground wells, then He produces with it plants of various colors, then they wither and you see them yellowing, then He turns them into debris? Surely in this is a reminder for those with understanding.