The word(s) "act" appears 82 time(s) in 70 verse(s) in Quran in Muhammad Pickthal translation.

(51) And they say: Our hearts are protected from that unto which thou (O Muhammad) callest us, and in our ears there is a deafness, and between us and thee there is a veil. act, then. Lo! we also shall be acting.

(52) And they said: O wizard! Entreat thy Lord for us by the pact that He hath made with thee. Lo! we verily will walk aright.

(53) But the factions among them differed. Then woe unto those who do wrong from the doom of a painful day.

(54) These are the portents of Allah which We recite unto thee (Muhammad) with truth. Then in what fact, after Allah and His portents, will they believe?

(55) Those who disbelieve and turn (men) from the way of Allah, He rendereth their actions vain.

(56) Now when ye meet in battle those who disbelieve, then it is smiting of the necks until, when ye have routed them, then making fast of bonds; and afterward either grace or ransom till the war lay down its burdens. That (is the ordinance). And if Allah willed He could have punished them (without you) but (thus it is ordained) that He may try some of you by means of others. And those who are slain in the way of Allah, He rendereth not their actions vain.

(57) And those who disbelieve, perdition is for them, and He will make their actions vain.

(58) That is because they are averse to that which Allah hath revealed, therefor maketh He their actions fruitless.

(59) That will be because they followed that which angereth Allah, and hated that which pleaseth Him. Therefor He hath made their actions vain.

(60) Lo! those who disbelieve and turn from the way of Allah and oppose the messenger after the guidance hath been manifested unto them, they hurt Allah not a jot, and He will make their actions fruitless.