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

(111) Who is then more unjust than he who forges a lie against Allah or rejects His communications? (As for) those, their portion of the Book shall reach them, until when Our apostles come to them causing them to die, they shall say: Where is that which you used to call upon besides Allah? They would say: They are gone away from us; and they shall bear witness against themselves that they were unbelievers

(112) What! do you wonder that a reminder has come to you from your Lord through a man from among you, that he might warn you and that you might guard (against evil) and so that mercy may be shown to you?

(113) And to Ad (We sent) their brother Hud. He said: O my people! serve Allah, you have no god other than Him; will you not then guard (against evil)?

(114) So they slew the she-camel and revolted against their Lord's commandment, and they said: O Salih! bring us what you threatened us with, if you are one of the apostles.

(115) Indeed we shall have forged a lie against Allah If we go back to your religion after Allah has delivered us from It, and it befits us not that we should go back to it, except if Allah our Lord please: Our Lord comprehends all things in His knowledge; in Allah do we trust: Our Lord! decide between us and our people with truth; and Thou art the best of deciders.

(116) And if the people of the towns had believed and guarded (against evil) We would certainly have opened up for them blessings from the heaven and the earth, but they rejected, so We overtook them for what they had earned.

(117) Musa said to his people: Ask help from Allah and be patient; surely the land is Allah's; He causes such of His servants to inherit it as He pleases, and the end is for those who guard (against evil).

(118) And ordain for us good in this world's life and in the hereafter, for surely we turn to Thee. He said: (As for) My chastisement, I will afflict with it whom I please, and My mercy encompasses all things; so I will ordain it (specially) for those who guard (against evil) and pay the poor-rate, and those who believe in Our communications.

(119) And when a party of them said: Why do you admonish a with a severe chastisement? They said: To be free from blame before your Lord, and that haply they may guard (against evil).

(120) And when your Lord announced that He would certainly send against them to the day of resurrection those who would subject them to severe torment; most surely your Lord is quick to requite (evil) and most surely He is Forgiving, Merciful.