The word(s) "guard" appears 80 time(s) in 76 verse(s) in Quran in Abdullah Yusuf Ali translation.

(1) O ye people! Adore your guardian-Lord, who created you and those who came before you, that ye may have the chance to learn righteousness;

(2) Then guard yourselves against a day when one soul shall not avail another nor shall intercession be accepted for her, nor shall compensation be taken from her, nor shall anyone be helped (from outside).

(3) If they had kept their Faith and guarded themselves from evil, far better had been the reward from their Lord, if they but knew!

(4) Then guard yourselves against a Day when one soul shall not avail another, nor shall compensation be accepted from her nor shall intercession profit her nor shall anyone be helped (from outside).

(5) guard strictly your (habit of) prayers, especially the Middle Prayer; and stand before Allah in a devout (frame of mind).

(6) Allah! There is no god but He,-the Living, the Self-subsisting, Eternal. No slumber can seize Him nor sleep. His are all things in the heavens and on earth. Who is there can intercede in His presence except as He permitteth? He knoweth what (appeareth to His creatures as) before or after or behind them. Nor shall they compass aught of His knowledge except as He willeth. His Throne doth extend over the heavens and the earth, and He feeleth no fatigue in guarding and preserving them for He is the Most High, the Supreme (in glory).

(7) O ye who believe! When ye deal with each other, in transactions involving future obligations in a fixed period of time, reduce them to writing Let a scribe write down faithfully as between the parties: let not the scribe refuse to write: as Allah Has taught him, so let him write. Let him who incurs the liability dictate, but let him fear His Lord Allah, and not diminish aught of what he owes. If they party liable is mentally deficient, or weak, or unable Himself to dictate, Let his guardian dictate faithfully, and get two witnesses, out of your own men, and if there are not two men, then a man and two women, such as ye choose, for witnesses, so that if one of them errs, the other can remind her. The witnesses should not refuse when they are called on (For evidence). Disdain not to reduce to writing (your contract) for a future period, whether it be small or big: it is juster in the sight of Allah, More suitable as evidence, and more convenient to prevent doubts among yourselves but if it be a transaction which ye carry out on the spot among yourselves, there is no blame on you if ye reduce it not to writing. But take witness whenever ye make a commercial contract; and let neither scribe nor witness suffer harm. If ye do (such harm), it would be wickedness in you. And fear Allah. And Allah teaches you. And Allah is well acquainted with all things.

(8) Let not the believers Take for friends or helpers Unbelievers rather than believers: if any do that, in nothing will there be help from Allah: except by way of precaution, that ye may guard yourselves from them. But Allah cautions you (To remember) Himself; for the final goal is to Allah.

(9) Ye shall certainly be tried and tested in your possessions and in your personal selves; and ye shall certainly Hear much that will grieve you, from those who received the Book before you and from those who worship many gods. But if ye persevere patiently, and guard against evil,-then that will be a determining factor in all affairs.

(10) O mankind! reverence your guardian-Lord, who created you from a single person, created, of like nature, His mate, and from them twain scattered (like seeds) countless men and women;- reverence Allah, through whom ye demand your mutual (rights), and (reverence) the wombs (That bore you): for Allah ever watches over you.