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

(71) Surely (as for) those who believe then disbelieve, again believe and again disbelieve, then increase in disbelief, Allah will not forgive them nor guide them in the (right) path.

(72) Those who wait for (some misfortune to befall) you then If you have a victory from Allah they say: Were we not with you? And if there is a chance for the unbelievers, they say: Did we not acquire the mastery over you and defend you from the believers? So Allah shall Judge between you on the day of resurrection, and Allah will by no means give the unbelievers a way against the believers.

(73) O you who believe! do not take the unbelievers for friends rather than the believers; do you desire that you should give to Allah a manifest proof against yourselves?

(74) And for their unbelief and for their having uttered against Marium a grievous calumny.

(75) And there is not one of the followers of the Book but most certainly believes in this before his death, and on the day of resurrection he (Isa) shall be a witness against them.

(76) (We sent) apostles as the givers of good news and as warners, so that people should not have a plea against Allah after the (coming of) apostles; and Allah is Mighty, Wise.

(77) O followers of the Book! do not exceed the limits in your religion, and do not speak (lies) against Allah, but (speak) the truth; the Messiah, Isa son of Marium is only an apostle of Allah and His Word which He communicated to Marium and a spirit from Him; believe therefore in Allah and His apostles, and say not, Three. Desist, it is better for you; Allah is only one Allah; far be It from His glory that He should have a son, whatever is in the heavens and whatever is in the earth is His, and Allah is sufficient for a Protector.

(78) O you who believe! fulfill the obligations. The cattle quadrupeds are allowed to you except that which is recited to you, not violating the prohibition against game when you are entering upon the performance of the pilgrimage; surely Allah orders what He desires.

(79) Certainly they disbelieve who say: Surely, Allah-- He is the Messiah, son of Marium. Say: Who then could control anything as against Allah when He wished to destroy the Messiah son of Marium and his mother and all those on the earth? And Allah's is the kingdom of the heavens and the earth and what is between them; He creates what He pleases; and Allah has power over all things,

(80) And relate to them the story of the two sons of Adam with truth when they both offered an offering, but it was accepted from one of them and was not accepted from the other. He said: I will most certainly slay you. (The other) said: Allah only accepts from those who guard (against evil).