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.

39:42God takes the souls at the time of their death, and those that have not died during their sleep. He retains those for which He has decreed death, and He releases the others until a predetermined time. In that are signs for people who reflect.