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

(21) It is made lawful to you to go into your wives on the night of the fast; they are an apparel for you and you are an apparel for them; Allah knew that you acted unfaithfully to yourselves, so He has turned to you (mercifully) and removed from you (this burden); so now be in contact with them and seek what Allah has ordained for you, and eat and drink until the whiteness of the day becomes distinct from the blackness of the night at dawn, then complete the fast till night, and have not contact with them while you keep to the mosques; these are the limits of Allah, so do not go near them. Thus does Allah make clear His communications for men that they may guard (against evil).

(22) And do not swallow up your property among yourselves by false means, neither seek to gain access thereby to the judges, so that you may swallow up a part of the property of men wrongfully while you know.

(23) They ask you concerning the new moon. Say: They are times appointed for (the benefit of) men, and (for) the pilgrimage; and it is not righteousness that you should enter the houses at their backs, but righteousness is this that one should guard (against evil); and go into the houses by their doors and be careful (of your duty) to Allah, that you may be successful.

(24) And fight with them until there is no persecution, and religion should be only for Allah, but if they desist, then there should be no hostility except against the oppressors.

(25) The Sacred month for the sacred month and all sacred things are (under the law of) retaliation; whoever then acts aggressively against you, inflict injury on him according to the injury he has inflicted on you and be careful (of your duty) to Allah and know that Allah is with those who guard (against evil).

(26) And laud Allah during the numbered days; then whoever hastens off in two days, there is no blame on him, and whoever remains behind, there is no blame on him, (this is) for him who guards (against evil), and be careful (of your duty) to Allah, and know that you shall be gathered together to Him.

(27) And when it is said to him, guard against (the punishment of) Allah; pride carries him off to sin, therefore hell is sufficient for him; and certainly it is an evil resting place.

(28) The life of this world is made to seem fair to those who disbelieve, and they mock those who believe, and those who guard (against evil) shall be above them on the day of resurrection; and Allah gives means of subsistence to whom he pleases without measure.

(29) And make not Allah because of your swearing (by Him) an obstacle to your doing good and guarding (against evil) and making peace between men, and Allah is Hearing, Knowing.

(30) And the divorced women should keep themselves in waiting for three courses; and it is not lawful for them that they should conceal what Allah has created in their wombs, if they believe in Allah and the last day; and their husbands have a better right to take them back in the meanwhile if they wish for reconciliation; and they have rights similar to those against them in a just manner, and the men are a degree above them, and Allah is Mighty, Wise.