The word(s) "back" appears 262 time(s) in 241 verse(s) in Quran in Muhammad Habib Shakir translation.

(131) Until when death overtakes one of them, he says: Send me back, my Lord, send me back;

(132) On that day Allah will pay back to them in full their just reward, and they shall know that Allah is the evident Truth.

(133) But if you do not find any one therein, then do not enter them until permission is given to you; and if it is said to you: Go back, then go back; this is purer for you; and Allah is Cognizant of what you do.

(134) And (as for) those who disbelieve, their deeds are like the mirage in a desert, which the thirsty man deems to be water; until when he comes to it he finds it to be naught, and there he finds Allah, so He pays back to him his reckoning in full; and Allah is quick in reckoning;

(135) And they say: We believe in Allah and in the apostle and we obey; then a party of them turn back after this, and these are not believers.

(136) Say: Obey Allah and obey the Apostle; but if you turn back, then on him rests that which is imposed on him and on you rests that which is imposed on you; and if you obey him, you are on the right way; and nothing rests on the Apostle but clear delivering (of the message).

(137) They said: No harm; surely to our Lord we go back;

(138) Except those who believe and do good and remember Allah much, and defend themselves after they are oppressed; and they who act unjustly shall know to what final place of turning they shall turn back.

(139) And cast down your staff. So when he saw it in motion as if it were a serpent, he turned back retreating and did not return: O Musa! fear not; surely the apostles shall not fear in My presence;

(140) And surely I am going to send a present to them, and shall wait to see what (answer) do the apostles bring back.