The word(s) "rest" appears 78 time(s) in 75 verse(s) in Quran in Mohsin Khan translation.

(21) He said: "Yes, and moreover you will (in that case) be of the nearest (to me)."

(22) Allah made it only as glad tidings, and that your hearts be at rest therewith. And there is no victory except from Allah. Verily, Allah is All-Mighty, All-Wise.

(23) He it is Who has appointed for you the night that you may rest therein, and the day to make things visible (to you). Verily, in this are Ayat (proofs, evidence, verses, lessons, signs, revelations, etc.) for a people who listen (i.e. those who think deeply).

(24) (A brief) enjoyment in this world! - and then unto Us will be their return, then We shall make them taste the severest torment because they used to disbelieve [in Allah, belie His Messengers, deny and challenge His Ayat (proofs, signs, verses, etc.)].

(25) And he [Nuh (Noah) عليه السلام] said: "Embark therein: in the Name of Allah will be its (moving) course and its (resting) anchorage. Surely, my Lord is Oft-Forgiving, Most Merciful." (Tafsir At-Tabari)

(26) And it was said: "O earth! Swallow up your water, and O sky! Withhold (your rain)." And the water was made to subside and the Decree (of Allah) was fulfilled (i.e. the destruction of the people of Nuh (Noah). And it (the ship) rested on (Mount) Judi, and it was said: "Away with the people who are Zalimun (polytheists and wrong-doers)!"

(27) And he said: "O my sons! Do not enter by one gate, but enter by different gates, and I cannot avail you against Allah at all. Verily! The decision rests only with Allah. In Him, I put my trust and let all those that trust, put their trust in Him."

(28) For those who answered their Lord's Call [believed in the Oneness of Allah and followed His Messenger Muhammad صلى الله عليه و سلم i.e. Islamic Monotheism] is Al-Husna (i.e. Paradise). But those who answered not His Call (disbelieved in the Oneness of Allah and followed not His Messenger Muhammad صلى الله عليه و سلم), if they had all that is in the earth together with its like, they would offer it in order to save themselves (from the torment, but it will be in vain). For them there will be the terrible reckoning. Their dwelling-place will be Hell; and worst indeed is that place for rest.

(29) Those who believed (in the Oneness of Allah - Islamic Monotheism), and whose hearts find rest in the remembrance of Allah: verily, in the remembrance of Allah do hearts find rest .

(30) Whoever disbelieved in Allah after his belief, except him who is forced thereto and whose heart is at rest with Faith; but such as open their breasts to disbelief, on them is wrath from Allah, and theirs will be a great torment.