The word(s) "duty" appears 132 time(s) in 121 verse(s) in Quran in Muhammad Pickthal translation.

(101) Friends on that day will be foes one to another, save those who kept their duty (to Allah).

(102) Lo! those who kept their duty will be in a place secured.

(103) A similitude of the Garden which those who keep their duty (to Allah) are promised: Therein are rivers of water unpolluted, and rivers of milk whereof the flavour changeth not, and rivers of wine delicious to the drinkers, and rivers of clear-run honey; therein for them is every kind of fruit, with pardon from their Lord. (Are those who enjoy all this) like those who are immortal in the Fire and are given boiling water to drink so that it teareth their bowels?

(104) O ye who believe! Be not forward in the presence of Allah and His messenger, and keep your duty to Allah. Lo! Allah is Hearer, Knower.

(105) The believers are naught else than brothers. Therefore make peace between your brethren and observe your duty to Allah that haply ye may obtain mercy.

(106) O ye who believe! Shun much suspicion; for lo! some suspicion is a crime. And spy not, neither backbite one another. Would one of you love to eat the flesh of his dead brother? Ye abhor that (so abhor the other)! And keep your duty (to Allah). Lo! Allah is Relenting, Merciful.

(107) Lo! those who kept their duty dwell in gardens and delight,

(108) O ye who believe! Be mindful of your duty to Allah and put faith in His messenger. He will give you twofold of His mercy and will appoint for you a light wherein ye shall walk, and will forgive you. Allah is Forgiving, Merciful;

(109) O ye who believe! When ye conspire together, conspire not together for crime and wrongdoing and disobedience toward the messenger, but conspire together for righteousness and piety, and keep your duty toward Allah, unto whom ye will be gathered.

(110) That which Allah giveth as spoil unto His messenger from the people of the townships, it is for Allah and His messenger and for the near of kin and the orphans and the needy and the wayfarer, that it become not a commodity between the rich among you. And whatsoever the messenger giveth you, take it. And whatsoever he forbiddeth, abstain (from it). And keep your duty to Allah. Lo! Allah is stern in reprisal.