The word(s) "guard" appears 60 time(s) in 55 verse(s) in Quran in Muhammad Pickthal translation.

(31) For him are angels ranged before him and behind him, who guard him by Allah's command. Lo! Allah changeth not the condition of a folk until they (first) change that which is in their hearts; and if Allah willeth misfortune for a folk there is none that can repel it, nor have they a defender beside Him.

(32) Lo! We, even We, reveal the Reminder, and lo! We verily are its guardian.

(33) And We have guarded it from every outcast devil,

(34) We gave unto Moses the Scripture, and We appointed it a guidance for the children of Israel, saying: Choose no guardian beside Me.

(35) Lo! My (faithful) bondmen - over them thou hast no power, and thy Lord sufficeth as (their) guardian.

(36) And if We willed We could withdraw that which We have revealed unto thee, then wouldst thou find no guardian for thee against Us in respect thereof.

(37) Say: Who guardeth you in the night or in the day from the Beneficent? Nay, but they turn away from mention of their Lord!

(38) And who guard their modesty -

(39) Hast thou seen him who chooseth for his god his own lust? Wouldst thou then be guardian over him?

(40) Thrust thy hand into the bosom of thy robe it will come forth white without hurt. And guard thy heart from fear. Then these shall be two proofs from your Lord unto Pharaoh and his chiefs. Lo! they are evil-living folk.