The word(s) "guardians" appears 12 time(s) in 11 verse(s) in Quran in Mohsin Khan translation.

(1) And try orphans (as regards their intelligence) until they reach the age of marriage; if then you find sound judgement in them, release their property to them, but consume it not wastefully and hastily fearing that they should grow up, and whoever (amongst guardians) is rich, he should take no wages, but if he is poor, let him have for himself what is just and reasonable (according to his labour). And when you release their property to them, take witness in their presence; and Allah is All-Sufficient in taking account.

(2) And let those (executors and guardians) have the same fear in their minds as they would have for their own, if they had left weak offspring behind. So let them fear Allah and speak right words.

(3) Forbidden to you (for marriage) are: your mothers, your daughters, your sisters, your father's sisters, your mother's sisters, your brother's daughters, your sister's daughters, your foster mother who gave you suck, your foster milk suckling sisters, your wives' mothers, your step daughters under your guardianship, born of your wives to whom you have gone in - but there is no sin on you if you have not gone in them (to marry their daughters), - the wives of your sons who (spring) from your own loins, and two sisters in wedlock at the same time, except for what has already passed; verily, Allah is Oft-Forgiving, Most Merciful.

(4) And whoever of you have not the means wherewith to wed free, believing women, they may wed believing girls from among those (slaves) whom your right hands possess, and Allah has full knowledge about your Faith; you are one from another. Wed them with the permission of their own folk (guardians, Auliya' or masters) and give them their Mahr according to what is reasonable; they (the above said captive and slave-girls) should be chaste, not committing illegal sex, nor taking boy-friends. And after they have been taken in wedlock, if they commit illegal sexual intercourse, their punishment is half that for free (unmarried) women. This is for him among you who is afraid of being harmed in his religion or in his body; but it is better for you that you practise self-restraint, and Allah is Oft-Forgiving, Most Merciful.

(5) He is the Irresistible, (Supreme) over His slaves, and He sends guardians (angels guarding and writing all of one's good and bad deeds) over you, until when death approaches one of you, Our Messengers (angel of death and his assistants) take his soul, and they never neglect their duty.

(6) And why should not Allah punish them while they hinder (men) from Al-Masjid-Al-Haram, and they are not its guardians? None can be its guardians except Al-Muttaqun (the pious - See V.2:2), but most of them know not.

(7) And as for those who take as Auliya' (guardians, supporters, helpers, lords, gods, protectors) others besides Him [i.e. they take false deities other than Allah as protectors, and they worship them] - Allah is Hafiz (Protector, Watcher) over them (i.e. takes care of their deeds and will recompense them), and you (O Muhammad صلى الله عليه و سلم) are not a Wakil (guardian or a disposer of their affairs) over them (to protect their deeds).

(8) Or have they taken (for worship) Auliya' (guardians, supporters, helpers, protectors, lords, gods) besides Him? But Allah - He Alone is the Wali (Lord, God, Protector). And it is He Who gives life to the dead, and He is Able to do all things.

(9) And they will have no Auliya' (protectors, helpers, guardians, lords) to help them other than Allah. And he whom Allah sends astray, for him there is no way.

(10) Over it are nineteen (angels as guardians and keepers of Hell).