The word(s) "guard" appears 74 time(s) in 69 verse(s) in Quran in Mohsin Khan translation.

(41) Or have they alihah (gods) who can guard them from Us? They have no power to help themselves, nor can they be protected from Us (i.e. from Our Torment).

(42) And of the Shayatin (devils from the jinn) were some who dived for him, and did other work besides that; and it was We Who guarded them.

(43) And she who guarded her chastity [Virgin Maryam (Mary)]: We breathed into (the sleeves of) her (shirt or garment) [through Our Ruh - Jibril (Gabriel)], and We made her and her son ['Îsa (Jesus)] a sign for Al-'Alamin (the mankind and jinn).

(44) And those who guard their chastity (i.e. private parts, from illegal sexual acts)

(45) And those who strictly guard their (five compulsory congregational) Salawat (prayers) (at their fixed stated hours).

(46) And you cannot escape in the earth or in the heaven (from Allah). And besides Allah you have neither any Wali (Protector or guardian) nor any Helper.

(47) Verily, the Muslims (those who submit to Allah in Islam) men and women, the believers men and women (who believe in Islamic Monotheism), the men and the women who are obedient (to Allah), the men and women who are truthful (in their speech and deeds), the men and the women who are patient (in performing all the duties which Allah has ordered and in abstaining from all that Allah has forbidden), the men and the women who are humble (before their Lord - Allah), the men and the women who give Sadaqat (i.e. Zakat, and alms), the men and the women who observe Saum (fast) (the obligatory fasting during the month of Ramadan, and the optional Nawafil fasting), the men and the women who guard their chastity (from illegal sexual acts) and the men and the women who remember Allah much with their hearts and tongues Allah has prepared for them forgiveness and a great reward (i.e. Paradise).

(48) And to guard against every rebellious devil.

(49) Verily, We have sent down to you (O Muhammad صلى الله عليه وسلم) the Book (this Qur'an) for mankind in truth. So whosoever accepts the guidance, it is only for his ownself, and whosoever goes astray, he goes astray only for his (own) loss. And you (O Muhammad صلى الله عليه وسلم) are not a Wakil (trustee or disposer of affairs, or guardian) over them.

(50) Allah is the Creator of all things, and He is the Wakil (Trustee, Disposer of affairs, guardian) over all things.