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

(221) Verily, those who recite the Book of Allah (this Qur'an), and perform As-Salat (Iqamat-as-Salat), and spend (in charity) out of what We have provided for them, secretly and openly, they hope for a (sure) trade-gain that will never perish.

(222) Indeed the Word (of punishment) has proved true against most of them, so they will not believe.

(223) And We sent not against his people after him a host from the heaven, nor was it needful for Us to send (such a thing).

(224) That he or it (Muhammad صلى الله عليه وسلم or the Qur'an) may give warning to him who is living (a healthy minded - the believer), and that Word (charge) may be justified against the disbelievers (dead, as they reject the warnings).

(225) They cannot help them, but they will be brought forward as a troop against those who worshipped them (at the time of Reckoning).

(226) And to guard against every rebellious devil.

(227) "So now the Word of our Lord has been justified against us, that we shall certainly (have to) taste (the torment).

(228) So they plotted a plot against him, but We made them the lowest.

(229) And the leaders among them went about (saying): "Go on, and remain constant to your alihah (gods)! Verily, this is a thing designed (against you)!

(230) Is, then one against whom the Word of punishment is justified (equal to the one who avoids evil)? Will you (O Muhammad صلى الله عليه وسلم) rescue him who is in the Fire?