The word(s) "fail" appears 34 time(s) in 34 verse(s) in Quran in Muhammad Pickthal translation.

(11) And as for those who will be glad (that day) they will be in the Garden, abiding there so long as the heavens and the earth endure save for that which thy Lord willeth: a gift unfailing.

(12) So, When they despaired of (moving) him, they conferred together apart. The eldest of them said: Know ye not how your father took an undertaking from you in Allah's name and how ye failed in the case of Joseph aforetime? Therefore I shall not go forth from the land until my father giveth leave or Allah judgeth for me. He is the Best of Judges.

(13) Had it been possible for a Lecture to cause the mountains to move, or the earth to be torn asunder, or the dead to speak, (this Qur'an would have done so). Nay, but Allah's is the whole command. Do not those who believe know that, had Allah willed, He could have guided all mankind? As for those who disbelieve, disaster ceaseth not to strike them because of what they do, or it dwelleth near their home until the threat of Allah come to pass. Lo! Allah faileth not to keep the tryst.

(14) A similitude of those who disbelieve in their Lord: Their works are as ashes which the wind bloweth hard upon a stormy day. They have no control of aught that they have earned. That is the extreme failure.

(15) And Satan saith, when the matter hath been decided: Lo! Allah promised you a promise of truth; and I promised you, then failed you. And I had no power over you save that I called unto you and ye obeyed me. So blame not, but blame yourselves. I cannot help you, nor can ye help me, Lo! I disbelieved in that which ye before ascribed to me. Lo! for wrong-doers is a painful doom.

(16) So think not that Allah will fail to keep His promise to His messengers. Lo! Allah is Mighty, Able to Requite (the wrong).

(17) And they proffer unto Allah submission on that day, and all that they used to invent hath failed them.

(18) And when harm toucheth you upon the sea, all unto whom ye cry (for succour) fail save Him (alone), but when He bringeth you safe to land, ye turn away, for man was ever thankless.

(19) But we surely can produce for thee magic the like thereof; so appoint a tryst between us and you, which neither we nor thou shall fail to keep, at a place convenient (to us both).

(20) Moses said unto them: Woe unto you! Invent not a lie against Allah, lest He extirpate you by some punishment. He who lieth faileth miserably.