The word(s) "gain" appears 351 time(s) in 314 verse(s) in Quran in Mohsin Khan translation.

(181) Then (again), surely, you will be resurrected on the Day of Resurrection.

(182) So We revealed to him (saying): "Construct the ship under Our Eyes and under Our Revelation (guidance). Then, when Our Command comes, and water gushes forth from the oven, take on board of each kind two (male and female), and your family, except those thereof against whom the Word has already gone forth. And address Me not in favour of those who have done wrong. Verily, they are to be drowned.

(183) "He is only a man who has invented a lie against Allah, and we are not going to believe in him."

(184) Say "In Whose Hand is the sovereignty of everything (i.e. treasures of each and everything)? And He protects (all), while against Whom there is no protector, (i.e. if Allah saves anyone none can punish or harm him, and if Allah punishes or harms anyone none can save him), if you know?" [Tafsir Al-Qurtubi]

(185) And the fifth (testimony should be) the invoking of the Curse of Allah on him if he be of those who tell a lie (against her).

(186) Verily those who brought forth the slander (against 'Aishah رضي الله عنها the wife of the Prophet صلى الله عليه وسلم) are a group among you. Consider it not a bad thing for you. Nay, it is good for you. Unto every man among them will be paid that which he had earned of the sin, and as for him among them who had the greater share therein, his will be a great torment.

(187) On the Day when their tongues, their hands, and their legs (or feet) will bear witness against them as to what they used to do.

(188) And let those who find not the financial means for marriage keep themselves chaste, until Allah enriches them of His Bounty. And such of your slaves as seek a writing (of emancipation), give them such writing, if you find that there is good and honesty in them. And give them something (yourselves) out of the wealth of Allah which He has bestowed upon you. And force not your maids to prostitution, if they desire chastity, in order that you may make a gain in the (perishable) goods of this worldly life. But if anyone compels them (to prostitution), then after such compulsion, Allah is Oft-Forgiving, Most Merciful (to those women, i.e. He will forgive them because they have been forced to do this evil act unwillingly).

(189) And no example or similitude do they bring (to oppose or to find fault in you or in this Qur'an), but We reveal to you the truth (against that similitude or example), and the better explanation thereof.

(190) Have you not seen how your Lord spread the shadow. If He willed, He could have made it still - But We have made the sun its guide (i.e. after the sunrise, the shadow shrinks and vanishes at midnoon and then again appears in the afternoon with the decline of the sun, and had there been no sunlight, there would have been no shadow).