The word(s) "heels" appears 7 time(s) in 6 verse(s) in Quran in Muhammad Habib Shakir translation.

(1) And thus We have made you a medium (just) nation that you may be the bearers of witness to the people and (that) the Apostle may be a bearer of witness to you; and We did not make that which you would have to be the qiblah but that We might distinguish him who follows the Apostle from him who turns back upon his heels, and this was surely hard except for those whom Allah has guided aright; and Allah was not going to make your faith to be fruitless; most surely Allah is Affectionate, Merciful to the people.

(2) And Muhammad is no more than an apostle; the apostles have already passed away before him; if then he dies or is killed will you turn back upon your heels? And whoever turns back upon his heels, he will by no means do harm to Allah in the least and Allah will reward the grateful.

(3) O you who believe! if you obey those who disbelieve they will turn you back upon your heels, so you will turn back losers.

(4) 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.

(5) And when the Shaitan made their works fair seeming to them, and said: No one can overcome you this day, and surely I am your protector: but when the two parties came in sight of each other he turned upon his heels, and said: Surely I am clear of you, surely I see what you do not see, surely I fear Allah; and Allah is severe in requiting (evil).

(6) My communications were indeed recited to you, but you used to turn back on your heels,