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

(191) The likeness of those who were entrusted with the (obligation of the) Taurat (Torah) (i.e. to obey its commandments and to practise its laws), but who subsequently failed in those (obligations), is as the likeness of a donkey which carries huge burdens of books (but understands nothing from them). How bad is the example of people who deny the Ayat (proofs, evidence, verses, signs, revelations) of Allah. And Allah guides not the people who are Zalimun (polytheists, wrong-doers, disbelievers).

(192) No calamity befalls, but by the Leave [i.e. Decision and Qadar (Divine Preordainments)] of Allah, and whosoever believes in Allah, He guides his heart [to the true faith with certainty, i.e. what has befallen him was already written for him by Allah from the Qadar (Divine Preordainments)]. And Allah is the All-Knower of everything.

(193) So it tasted the evil result of its affair (disbelief), and the consequence of its affair (disbelief) was loss (destruction in this life and an eternal punishment in the Hereafter).

(194) Calling (all) such as turn their backs and turn away their faces (from faith) [picking and swallowing them up from that great gathering of mankind on the Day of Resurrection just as a bird picks up a food-grain from the earth with its beak and swallows it up] (Tafsir Al-Qurtubi)

(195) (He Alone is) the Lord of the east and the west; La ilaha illa Huwa (none has the right to be worshipped but He). So take Him Alone as Wakil (Disposer of your affairs).

(196) And We have set none but angels as guardians of the Fire. And We have fixed their number (19) only as a trial for the disbelievers, in order that the people of the Scripture (Jews and Christians) may arrive at a certainty [that this Qur'an is the truth as it agrees with their Books regarding the number (19) which is written in the Taurat (Torah) and the Injeel (Gospel)] and that the believers may increase in faith (as this Qur'an is the truth), and that no doubt may be left for the people of the Scripture and the believers, and that those in whose hearts is a disease (of hypocrisy) and the disbelievers may say: "What Allah intends by this (curious) example ?" Thus Allah leads astray whom He wills and guides whom He wills. And none can know the hosts of your Lord but He. And this (Hell) is nothing else than a (warning) reminder to mankind.

(197) Glad with their endeavour (for their good deeds which they did in this world, along with the true faith of Islamic Monotheism).

(198) Indeed he succeeds who purifies his ownself (i.e. obeys and performs all that Allah ordered, by following the true faith of Islamic Monotheism and by doing righteous good deeds).

(199) And indeed he fails who corrupts his ownself (i.e. disobeys what Allah has ordered by rejecting the true faith of Islamic Monotheism or by following polytheism or by doing every kind of evil wicked deeds).

(200) Thamud (people) denied (their Prophet) through their transgression (by rejecting the true faith of Islamic Monotheism, and by following polytheism, and by committing every kind of sin).