The word(s) "arm" appears 82 time(s) in 73 verse(s) in Quran in Abdullah Yusuf Ali translation.

(11) What ye suffered on the day the two armies Met, was with the leave of Allah, in order that He might test the believers,-

(12) Men said to them: "A great army is gathering against you": And frightened them: But it (only) increased their Faith: They said: "For us Allah sufficeth, and He is the best disposer of affairs."

(13) And they returned with Grace and bounty from Allah: no harm ever touched them: For they followed the good pleasure of Allah: And Allah is the Lord of bounties unbounded.

(14) Let not those grieve thee who rush headlong into Unbelief: Not the least harm will they do to Allah: Allah's plan is that He will give them no portion in the Hereafter, but a severe punishment.

(15) Those who purchase Unbelief at the price of faith,- not the least harm will they do to Allah, but they will have a grievous punishment.

(16) "This is because of the (unrighteous deeds) which your hands sent on before ye: For Allah never harms those who serve Him."

(17) And their Lord hath accepted of them, and answered them: "Never will I suffer to be lost the work of any of you, be he male or female: Ye are members, one of another: Those who have left their homes, or been driven out therefrom, or suffered harm in My Cause, or fought or been slain,- verily, I will blot out from them their iniquities, and admit them into Gardens with rivers flowing beneath;- A reward from the presence of Allah, and from His presence is the best of rewards."

(18) When thou (O Messenger) art with them, and standest to lead them in prayer, Let one party of them stand up (in prayer) with thee, Taking their arms with them: When they finish their prostrations, let them Take their position in the rear. And let the other party come up which hath not yet prayed - and let them pray with thee, Taking all precaution, and bearing arms: the Unbelievers wish, if ye were negligent of your arms and your baggage, to assault you in a single rush. But there is no blame on you if ye put away your arms because of the inconvenience of rain or because ye are ill; but take (every) precaution for yourselves. For the Unbelievers Allah hath prepared a humiliating punishment.

(19) But for the Grace of Allah to thee and his Mercy, a party of them would certainly have plotted to lead thee astray. But (in fact) they will only Lead their own souls astray, and to thee they can do no harm in the least. For Allah hath sent down to thee the Book and wisdom and taught thee what thou Knewest not (before): And great is the Grace of Allah unto thee.

(20) O ye who believe! when ye prepare for prayer, wash your faces, and your hands (and arms) to the elbows; Rub your heads (with water); and (wash) your feet to the ankles. If ye are in a state of ceremonial impurity, bathe your whole body. But if ye are ill, or on a journey, or one of you cometh from offices of nature, or ye have been in contact with women, and ye find no water, then take for yourselves clean sand or earth, and rub therewith your faces and hands, Allah doth not wish to place you in a difficulty, but to make you clean, and to complete his favour to you, that ye may be grateful.