The word(s) "keys" appears 4 time(s) in 4 verse(s) in Quran in Muhammad Pickthal translation.

(1) And with Him are the keys of the Invisible. None but He knoweth them. And He knoweth what is in the land and the sea. Not a leaf falleth but He knoweth it, not a grain amid the darkness of the earth, naught of wet or dry but (it is noted) in a clear record.

(2) No blame is there upon the blind nor any blame upon the lame nor any blame upon the sick nor on yourselves if ye eat from your houses, or the houses of your fathers, or the houses of your mothers, or the houses of your brothers, or the houses of your sisters, or the houses of your fathers' brothers, or the houses of your fathers' sisters, or the houses of your mothers' brothers, or the houses of your mothers' sisters, or (from that) whereof ye hold the keys, or (from the house) of a friend. No sin shall it be for you whether ye eat together or apart. But when ye enter houses, salute one another with a greeting from Allah, blessed and sweet. Thus Allah maketh clear His revelations for you, that haply ye may understand.

(3) His are the keys of the heavens and the earth, and they who disbelieve the revelations of Allah - such are they who are the losers.

(4) His are the keys of the heavens and the earth. He enlargeth providence for whom He will and straiteneth (it for whom He will). Lo! He is Knower of all things.