The word(s) "back" appears 101 time(s) in 98 verse(s) in Quran in Muhammad Pickthal translation.

(61) And when he came unto the water of Midian he found there a whole tribe of men, watering. And he found apart from them two women keeping back (their flocks). He said: What aileth you? The two said: We cannot give (our flocks) to drink till the shepherds return from the water; and our father is a very old man.

(62) And he and his hosts were haughty in the land without right, and deemed that they would never be brought back to Us.

(63) And He is Allah; there is no Allah save Him. His is all praise in the former and the latter (state), and His is the command, and unto Him ye will be brought back.

(64) And cry not unto any other god along with Allah. There is no Allah save Him. Everything will perish save His countenance. His is the command, and unto Him ye will be brought back.

(65) Ye serve instead of Allah only idols, and ye only invent a lie. Lo! those whom ye serve instead of Allah own no provision for you. So seek your provision from Allah, and serve Him, and give thanks unto Him, (for) unto Him ye will be brought back.

(66) Couldst thou but see when the guilty hang their heads before their Lord, (and say): Our Lord! We have now seen and heard, so send us back; we will do right, now we are sure.

(67) And as for those who do evil, their retreat is the Fire. Whenever they desire to issue forth from thence, they are brought back thither. Unto them it is said: Taste the torment of the Fire which ye used to deny.

(68) And when a party of them said: O folk of Yathrib! There is no stand (possible) for you, therefor turn back. And certain of them (even) sought permission of the Prophet, saying: Our homes lie open (to the enemy). And they lay not open. They but wished to flee.

(69) And verily they had already sworn unto Allah that they would not turn their backs (to the foe). An oath to Allah must be answered for.

(70) And if they deny thee, (O Muhammad), messengers (of Allah) were denied before thee. Unto Allah all things are brought back.