The word(s) "fain" appears 13 time(s) in 13 verse(s) in Quran in Muhammad Pickthal translation.

(1) faint not nor grieve, for ye will overcome them if ye are (indeed) believers.

(2) fain would they put out the light of Allah with their mouths, but Allah disdaineth (aught) save that He shall perfect His light, however much the disbelievers are averse.

(3) Their messengers said: Can there be doubt concerning Allah, the Creator of the heavens and the earth? He calleth you that He may forgive you your sins and reprieve you unto an appointed term. They said: Ye are but mortals like us, who would fain turn us away from what our fathers used to worship. Then bring some clear warrant.

(4) Go, thou and thy brother, with My tokens, and be not faint in remembrance of Me.

(5) On that day they follow the summoner who deceiveth not, and voices are hushed for the Beneficent, and thou hearest but a faint murmur.

(6) He said: Lo! I fain would marry thee to one of these two daughters of mine on condition that thou hirest thyself to me for (the term of) eight pilgrimages. Then if thou completest ten it will be of thine own accord, for I would not make it hard for thee. Allah willing, thou wilt find me of the righteous.

(7) Being sparing of their help to you (believers). But when the fear cometh, then thou (Muhammad) seest them regarding thee with rolling eyes like one who fainteth unto death. Then, when the fear departeth, they scald you with sharp tongues in their greed for wealth (from the spoil). Such have not believed. Therefor Allah maketh their deeds fruitless. And that is easy for Allah.

(8) They hold that the clans have not retired (for good); and if the clans should advance (again), they would fain be in the desert with the wandering Arabs, asking for the news of you; and if they were among you, they would not give battle, save a little.

(9) And those who believe say: If only a surah were revealed! But when a decisive surah is revealed and war is mentioned therein, thou seest those in whose hearts is a disease looking at thee with the look of men fainting unto death. Therefor woe unto them!

(10) Those who were left behind will say, when ye set forth to capture booty: Let us go with you. They fain would change the verdict of Allah. Say (unto them, O Muhammad): Ye shall not go with us. Thus hath Allah said beforehand. Then they will say: Ye are envious of us. Nay, but they understand not, save a little.