The word(s) "fai" appears 219 time(s) in 200 verse(s) in Quran in Mohsin Khan translation.

(91) Each of those two gardens brought forth its produce, and failed not in the least therein, and We caused a river to gush forth in the midst of them.

(92) [Musa (Moses)] said: "Call me not to account for what I forgot, and be not hard upon me for my affair (with you)."

(93) "Then verily, we can produce magic the like thereof; so appoint a meeting between us and you, which neither we nor you shall fail to keep, in an open place where both shall have a just and equal chance (and beholders could witness the competition)."

(94) Musa (Moses) said to them: "Woe unto you! Invent not a lie against Allah, lest He should destroy you completely by a torment. And surely, he who invents a lie (against Allah) will fail miserably."

(95) Then Musa (Moses) returned to his people in a state of anger and sorrow. He said: "O my people! Did not your Lord promise you a fair promise? Did then the promise seem to you long in coming? Or did you desire that wrath should descend from your Lord on you, that you broke your promise to me (i.e disbelieving in Allah and worshipping the calf)?"

(96) Musa (Moses) said: "Then go away! And verily, your (punishment) in this life will be that you will say: "Touch me not (i.e. you will live alone exiled away from mankind); and verily (for a future torment), you have a promise that will not fail. And look at your ilah (god) to which you have been devoted. We will certainly burn it, and scatter its particles in the sea."

(97) And (all) faces shall be humbled before (Allah), Al-Hayyul-Qayyum (the Ever Living, the One Who sustains and protects all that exists). And he who carried (a burden of) wrongdoing (i.e. he who disbelieved in Allah, ascribed partners to Him, and did deeds of His disobedience), will be indeed a complete failure (on that Day).

(98) And (remember) Lut (Lot), We gave him Hukm (right judgement of the affairs and Prophethood) and (religious) knowledge, and We saved him from the town (folk) who practised Al-Khaba'ith (evil, wicked and filthy deeds). Verily, they were a people given to evil, and were Fasiqun (rebellious, disobedient to Allah).

(99) And We made Sulaiman (Solomon) to understand (the case); and to each of them We gave Hukm (right judgement of the affairs and Prophethood) and knowledge. And We subjected the mountains and the birds to glorify Our Praises along with Dawud (David). And it was We Who were the doer (of all these things).

(100) And they ask you to hasten on the torment! And Allah fails not His Promise. And verily, a day with your Lord is as a thousand years of what you reckon.