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

(31) And for the divorced women (too) provision (must be made) according to usage; (this is) a duty on those who guard (against evil).

(32) Have you not considered those who went forth from their homes, for fear of death, and they were thousands, then Allah said to them, Die; again He gave them life; most surely Allah is Gracious to people, but most people are not grateful.

(33) So when Talut departed with the forces, he said: Surely Allah will try you with a river; whoever then drinks from it, he is not of me, and whoever does not taste of it, he is surely of me, except he who takes with his hand as much of it as fills the hand; but with the exception of a few of them they drank from it. So when he had crossed it, he and those who believed with him, they said: We have today no power against Jalut and his forces. Those who were sure that they would meet their Lord said: How often has a small party vanquished a numerous host by Allah's permission, and Allah is with the patient.

(34) And when they went out against Jalut and his forces they said: Our Lord, pour down upon us patience, and make our steps firm and assist us against the unbelieving people.

(35) O you who believe! spend out of what We have given you before the day comes in which there is no bargaining, neither any friendship nor intercession, and the unbelievers-- they are the unjust.

(36) O you who believe! do not make your charity worthless by reproach and injury, like him who spends his property to be seen of men and does not believe in Allah and the last day; so his parable is as the parable of a smooth rock with earth upon it, then a heavy rain falls upon it, so it leaves it bare; they shall not be able to gain anything of what they have earned; and Allah does not guide the unbelieving people.

(37) And guard yourselves against a day in which you shall be returned to Allah; then every soul shall be paid back in full what it has earned, and they shall not be dealt with unjustly.

(38) Allah does not impose upon any soul a duty but to the extent of its ability; for it is (the benefit of) what it has earned and upon it (the evil of) what it has wrought: Our Lord! do not punish us if we forget or make a mistake; Our Lord! do not lay on us a burden as Thou didst lay on those before us, Our Lord do not impose upon us that which we have not the strength to bear; and pardon us and grant us protection and have mercy on us, Thou art our Patron, so help us against the unbelieving people.

(39) (As for) those who disbelieve, surely neither their wealth nor their children shall avail them in the least against Allah, and these it is who are the fuel of the fire.

(40) Say: Shall I tell you what is better than these? For those who guard (against evil) are gardens with their Lord, beneath which rivers flow, to abide in them, and pure mates and Allah's pleasure; and Allah sees the servants.