The word(s) "fast" appears 31 time(s) in 26 verse(s) in Quran in Muhammad Habib Shakir translation.

(11) Then as for those who believe in Allah and hold fast by Him, He will cause them to enter into His mercy and grace and guide them to Himself on a right path.

(12) Allah does not call you to account for what is vain in your oaths, but He calls you to account for the making of deliberate oaths; so its expiation is the feeding of ten poor men out of the middling (food) you feed your families with, or their clothing, or the freeing of a neck; but whosoever cannot find (means) then fasting for three days; this is the expiation of your oaths when you swear; and guard your oaths. Thus does Allah make clear to you His communications, that you may be Fateful.

(13) O you who believe! do not kill game while you are on pilgrimage, and whoever among you shall kill it intentionally, the compensation (of it) is the like of what he killed, from the cattle, as two just persons among you shall judge, as an offering to be brought to the Kaaba or the expiation (of it) is the feeding of the poor or the equivalent of it in fasting, that he may taste the unwholesome result of his deed; Allah has pardoned what is gone by; and whoever returns (to it), Allah will inflict retribution on him; and Allah is Mighty, Lord of Retribution.

(14) And (as for) those who hold fast by the Book and keep up prayer, surely We do not waste the reward of the right doers.

(15) They who turn (to Allah), who serve (Him), who praise (Him), who fast, who bow down, who prostrate themselves, who enjoin what is good and forbid what is evil, and who keep the limits of Allah; and give good news to the believers.

(16) And she in whose house he was sought to make himself yield (to her), and she made fast the doors and said: Come forward. He said: I seek Allah's refuge, surely my Lord made good my abode: Surely the unjust do not prosper.

(17) And fulfill the covenant of Allah when you have made a covenant, and do not break the oaths after making them fast, and you have indeed made Allah a surety for you; surely Allah knows what you do.

(18) So eat and drink and refresh the eye. Then if you see any mortal, say: Surely I have vowed a fast to the Beneficent Allah, so I shall not speak to any man today.

(19) And strive hard in (the way of) Allah, (such) a striving as is due to Him; He has chosen you and has not laid upon you an hardship in religion; the faith of your father Ibrahim; He named you Muslims before and in this, that the Apostle may be a bearer of witness to you, and you may be bearers of witness to the people; therefore keep up prayer and pay the poor-rate and hold fast by Allah; He is your Guardian; how excellent the Guardian and how excellent the Helper!

(20) These shall be granted their reward twice, because they are steadfast and they repel evil with good and spend out of what We have given them.