The word(s) "back" appears 161 time(s) in 150 verse(s) in Quran in Mohsin Khan translation.

(71) Say (to the disbelievers): "If you possessed the treasure of the Mercy of my Lord (wealth, money, provision.), then you would surely hold back (from spending) for fear of (being exhausted), and man is ever miserly!"

(72) And you would have thought them awake, whereas they were asleep. And We turned them on their right and on their left sides, and their dog stretching forth his two forelegs at the entrance [of the Cave or in the space near to the entrance of the Cave (as a guard at the gate)]. Had you looked at them, you would certainly have turned back from them in flight, and would certainly have been filled with awe of them.

(73) "For, if they come to know of you, they will stone you (to death or abuse and harm you) or turn you back to their religion; and in that case you will never be successful."

(74) "And I think not the Hour will ever come, and if indeed I am brought back to my Lord, (on the Day of Resurrection), I surely shall find better than this when I return to Him."

(75) [Musa (Moses)] said: "That is what we have been seeking." So they went back retracing their footsteps.

(76) He said: "As for him (a disbeliever in the Oneness of Allah) who does wrong, we shall punish him, and then he will be brought back unto his Lord, Who will punish him with a terrible torment (Hell).

(77) So Fir'aun (Pharaoh) withdrew, devised his plot and then came back.

(78) If only those who disbelieved knew (the time) when they will not be able to ward off the Fire from their faces, nor from their backs, and they will not be helped.

(79) "And by Allah, I shall plot a plan (to destroy) your idols after you have gone away and turned your backs."

(80) O mankind! If you are in doubt about the Resurrection, then verily We have created you (i.e. Adam) from dust, then from a Nutfah (mixed drops of male and female sexual discharge i.e. the offspring of Adam), then from a clot (a piece of thick coagulated blood) then from a little lump of flesh - some formed and some unformed (as in the case of miscarriage) - that We may make (it) clear to you (i.e. to show you Our Power and Ability to do what We will). And We cause whom We will to remain in the wombs for an appointed term, then We bring you out as infants, then (give you growth) that you may reach your age of full strength. And among you there is he who dies (young), and among you there is he who is brought back to the miserable old age, so that he knows nothing after having known. And you see the earth barren, but when We send down water (rain) on it, it is stirred (to life), and it swells and puts forth every lovely kind (of growth).