The word(s) "back" appears 225 time(s) in 216 verse(s) in Quran in Abdullah Yusuf Ali translation.

(131) Truly thou canst not cause the dead to listen, nor canst thou cause the deaf to hear the call, (especially) when they turn back in retreat.

(132) And when he arrived at the watering (place) in Madyan, he found there a group of men watering (their flocks), and besides them he found two women who were keeping back (their flocks). He said: "What is the matter with you?" They said: "We cannot water (our flocks) until the shepherds take back (their flocks): And our father is a very old man."

(133) So he watered (their flocks) for them; then he turned back to the shade, and said:"O my Lord! truly am I in (desperate) need of any good that Thou dost send me!"

(134) Afterwards one of the (damsels) came (back) to him, walking bashfully. She said: "My father invites thee that he may reward thee for having watered (our flocks) for us." So when he came to him and narrated the story, he said: "Fear thou not: (well) hast thou escaped from unjust people."

(135) "Now do thou throw thy rod!" but when he saw it moving (of its own accord) as if it had been a snake, he turned back in retreat, and retraced not his steps: O Moses!" (It was said), "Draw near, and fear not: for thou art of those who are secure.

(136) And He is Allah: There is no god but He. To Him be praise, at the first and at the last: for Him is the Command, and to Him shall ye (all) be brought back.

(137) Verily He Who ordained the Qur'an for thee, will bring thee back to the Place of Return. Say: "My Lord knows best who it is that brings true guidance, and who is in manifest error."

(138) And let nothing keep thee back from the Signs of Allah after they have been revealed to thee: and invite (men) to thy Lord, and be not of the company of those who join gods with Allah.

(139) And call not, besides Allah, on another god. There is no god but He. Everything (that exists) will perish except His own Face. To Him belongs the Command, and to Him will ye (all) be brought back.

(140) (Remember also) the 'Ad and the Thamud (people): clearly will appear to you from (the traces) of their buildings (their fate): the Evil One made their deeds alluring to them, and kept them back from the Path, though they were gifted with intelligence and skill.