The word(s) "gain" appears 419 time(s) in 395 verse(s) in Quran in Muhammad Habib Shakir translation.

(101) And two of camels and two of cows. Say: Has He forbidden the two males or the two females or that which the wombs of the two females contain? Or were you witnesses when Allah enjoined you this? Who, then, is more unjust than he who forges a lie against Allah that he should lead astray men without knowledge? Surely Allah does not guide the unjust people.

(102) And do not approach the property of the orphan except in the best manner until he attains his maturity, and give full measure and weight with justice-- We do not impose on any soul a duty except to the extent of its ability; and when you speak, then be just though it be (against) a relative, and fulfill Allah's covenant; this He has enjoined you with that you may be mindful;

(103) And (know) that this is My path, the right one therefore follow it, and follow not (other) ways, for they will lead you away from His way; this He has enjoined you with that you may guard (against evil).

(104) Again, We gave the Book to Musa to complete (Our blessings) on him who would do good (to others), and making plain all things and a guidance and a mercy, so that they should believe in the meeting of their Lord.

(105) And this is a Book We have revealed, blessed; therefore follow it and guard (against evil) that mercy may be shown to you.

(106) Say: What! shall I seek a Lord other than Allah? And He is the Lord of all things; and no soul earns (evil) but against itself, and no bearer of burden shall bear the burden of another; then to your Lord is your return, so He will inform you of that in which you differed.

(107) O children of Adam! We have indeed sent down to you clothing to cover your shame, and (clothing) for beauty and clothing that guards (against evil), that is the best. This is of the communications of Allah that they may be mindful.

(108) And when they commit an indecency they say: We found our fathers doing this, and Allah has enjoined it on us. Say: Surely Allah does not enjoin indecency; do you say against Allah what you do not know?

(109) Say: My Lord has only prohibited indecencies, those of them that are apparent as well as those that are concealed, and sin and rebellion without justice, and that you associate with Allah that for which He has not sent down any authority, and that you say against Allah what you do not know.

(110) O children of Adam! if there come to you apostles from among you relating to you My communications, then whoever shall guard (against evil) and act aright-- they shall have no fear nor shall they grieve.