The word(s) "guard" appears 249 time(s) in 233 verse(s) in Quran in Muhammad Habib Shakir translation.

(171) And We delivered those who believed and who guarded (against evil).

(172) (As for) that future abode, We assign it to those who have no desire to exalt themselves in the earth nor to make mischief and the good end is for those who guard (against evil)

(173) The parable of those who take guardians besides Allah is as the parable of the spider that makes for itself a house; and most surely the frailest of the houses is the spider's house did they but know.

(174) O people! guard against (the punishment of) your Lord and dread the day when a father shall not make any satisfaction for his son, nor shall the child be the maker of any satisfaction for his father; surely the promise of Allah is true, therefore let not this world's life deceive you, nor let the archdeceiver deceive you in respect of Allah.

(175) Allah is He Who created the heavens and the earth and what is between them in six periods, and He mounted the throne (of authority); you have not besides Him any guardian or any intercessor, will you not then mind?

(176) Say: Who is it that can withhold you from Allah if He intends to do you evil, rather He intends to show you mercy? And they will not find for themselves besides Allah any guardian or a helper.

(177) O wives of the Prophet! you are not like any other of the women; If you will be on your guard, then be not soft in (your) speech, lest he in whose heart is a disease yearn; and speak a good word.

(178) Surely the men who submit and the women who submit, and the believing men and the believing women, and the obeying men and the obeying women, and the truthful men and the truthful women, and the patient men and the patient women and the humble men and the humble women, and the almsgiving men and the almsgiving women, and the fasting men and the fasting women, and the men who guard their private parts and the women who guard, and the men who remember Allah much and the women who remember-- Allah has prepared for them forgiveness and a mighty reward.

(179) They shall say: Glory be to Thee! Thou art our guardian, not they; nay! they worshipped the jinn; most of them were believers in them.

(180) And when it is said to them: guard against what is before you and what is behind you, that mercy may be had on you.