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

(81) And when We shook the mountain over them as if it were a covering overhead, and they thought that it was going to fall down upon them: Take hold of what We have given you with firmness, and be mindful of what is in it, so that you may guard (against evil).

(82) Surely my guardian is Allah, Who revealed the Book, and He befriends the good.

(83) Surely those who guard (against evil), when a visitation from the Shaitan afflicts them they become mindful, then lo! they see.

(84) And what (excuse) have they that Allah should not chastise them while they hinder (men) from the Sacred Mosque and they are not (fit to be) guardians of it; its guardians are only those who guard (against evil), but most of them do not know.

(85) Those with whom you make an agreement, then they break their agreement every time and they do not guard (against punishment).

(86) Surely those who believed and fled (their homes) and struggled hard in Allah's way with their property and their souls, and those who gave shelter and helped-- these are guardians of each other; and (as for) those who believed and did not fly, not yours is their guardianship until they fly; and if they seek aid from you in the matter of religion, aid is incumbent on you except against a people between whom and you there is a treaty, and Allah sees what you do.

(87) And (as for) those who disbelieve, some of them are the guardians of others; if you will not do it, there will be in the land persecution and great mischief.

(88) What! do you make (one who undertakes) the giving of drink to the pilgrims and the guarding of the Sacred Mosque like him who believes in Allah and the latter day and strives hard in Allah's way? They are not equal with Allah; and Allah does not guide the unjust people.

(89) O you who believe! do not take your fathers and your brothers for guardians if they love unbelief more than belief; and whoever of you takes them for a guardian, these it is that are the unjust.

(90) Surely the number of months with Allah is twelve months in Allah's ordinance since the day when He created the heavens and the earth, of these four being sacred; that is the right reckoning; therefore be not unjust to yourselves regarding them, and fight the polytheists all together as they fight you all together; and know that Allah is with those who guard (against evil).