The word(s) "affair" appears 70 time(s) in 65 verse(s) in Quran in Abdullah Yusuf Ali translation.

(31) Thus did We make their case known to the people, that they might know that the promise of Allah is true, and that there can be no doubt about the Hour of Judgment. Behold, they dispute among themselves as to their affair. (Some) said, "Construct a building over them": Their Lord knows best about them: those who prevailed over their affair said, "Let us surely build a place of worship over them."

(32) (Some) say they were three, the dog being the fourth among them; (others) say they were five, the dog being the sixth,- doubtfully guessing at the unknown; (yet others) say they were seven, the dog being the eighth. Say thou: "My Lord knoweth best their number; It is but few that know their (real case)." Enter not, therefore, into controversies concerning them, except on a matter that is clear, nor consult any of them about (the affair of) the Sleepers.

(33) So they disputed, one with another, over their affair, but they kept their talk secret.

(34) But (later generations) cut off their affair (of unity), one from another: (yet) will they all return to Us.

(35) (They are) those who, if We establish them in the land, establish regular prayer and give regular charity, enjoin the right and forbid wrong: with Allah rests the end (and decision) of (all) affairs.

(36) But people have cut off their affair (of unity), between them, into sects: each party rejoices in that which is with itself.

(37) Why did not the believers - men and women - when ye heard of the affair,- put the best construction on it in their own minds and say, "This (charge) is an obvious lie"?

(38) Were it not for the grace and mercy of Allah on you, in this world and the Hereafter, a grievous penalty would have seized you in that ye rushed glibly into this affair.

(39) Seest thou such a one as taketh for his god his own passion (or impulse)? Couldst thou be a disposer of affairs for him?

(40) Except those who believe, work righteousness, engage much in the remembrance of Allah, and defend themselves only after they are unjustly attacked. And soon will the unjust assailants know what vicissitudes their affairs will take!