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

(51) Say: Shall we call on that besides Allah, which does not benefit us nor harm us, and shall we be returned back on our heels after Allah has guided us, like him whom the Shaitans have made to fall down perplexed in the earth? He has companions who call him to the right way, (saying): Come to us. Say: Surely the guidance of Allah, that is the (true) guidance, and we are commanded that we should submit to the Lord of the worlds.

(52) And certainly you have come to Us alone as We created you at first, and you have left behind your backs the things which We gave you, and We do not see with you your intercessors about whom you asserted that they were (Allah's) associates in respect to you; certainly the ties between you are now cut off and what you asserted is gone from you.

(53) And they say: These are cattle and tilth prohibited, none shall eat them except such as We please-- so they assert-- and cattle whose backs are forbidden, and cattle on which they would not mention Allah's name-- forging a lie against Him; He shall requite them for what they forged.

(54) And to those who were Jews We made unlawful every animal having claws, and of oxen and sheep We made unlawful to them the fat of both, except such as was on their backs or the entrails or what was mixed with bones: this was a punishment We gave them on account of their rebellion, and We are surely Truthful.

(55) Do they wait for aught but its final sequel? On the day when its final sequel comes about, those who neglected it before will say: Indeed the apostles of our Lord brought the truth; are there for us then any intercessors so that they should intercede on our behalf? Or could we be sent back so that we should do (deeds) other than those which we did? Indeed they have lost their souls and that which they forged has gone away from them.

(56) The chiefs, those who were proud from among his people said: We will most certainly turn you out, O Shu'aib, and (also; those who believe with you, from our town, or you shall come back to our faith. He said: What! though we dislike (it)?

(57) Indeed we shall have forged a lie against Allah If we go back to your religion after Allah has delivered us from It, and it befits us not that we should go back to it, except if Allah our Lord please: Our Lord comprehends all things in His knowledge; in Allah do we trust: Our Lord! decide between us and our people with truth; and Thou art the best of deciders.

(58) Thus they were vanquished there, and they went back abased.

(59) They said: Surely to our Lord shall we go back:

(60) And when your Lord brought forth from the children of Adam, from their backs, their descendants, and made them bear witness against their own souls: Am I not your Lord? They said: Yes! we bear witness. Lest you should say on the day of resurrection: Surely we were heedless of this.