The word(s) "master" appears 14 time(s) in 13 verse(s) in Quran in Mohsin Khan translation.

(1) 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.

(2) Those (hypocrites) who wait and watch about you; if you gain a victory from Allah, they say: "Were we not with you?" But if the disbelievers gain a success, they say (to them): "Did we not gain mastery over you and did we not protect you from the believers?" Allah will judge between you (all) on the Day of Resurrection. And never will Allah grant to the disbelievers a way (to triumph) over the believers.

(3) Then they are returned to Allah, their True Maula [True master (God), the Just Lord (to reward them)]. Surely, for Him is the judgement and He is the Swiftest in taking account.

(4) So if you gain the mastery over them in war, punish them severely in order to disperse those who are behind them, so that they may learn a lesson.

(5) And she, in whose house he was, sought to seduce him (to do an evil act), and she closed the doors and said: "Come on, O you." He said: "I seek refuge in Allah (or Allah forbid)! Truly, he (your husband) is my master! He made my living in a great comfort! (So I will never betray him). Verily, the Zalimun (wrong and evil-doers) will never be successful."

(6) "O two companions of the prison! As for one of you, he (as a servant) will pour out wine for his lord (king or master) to drink; and as for the other, he will be crucified and birds will eat from his head. Thus is the case judged concerning which you both did inquire."

(7) And Allah puts forward (another) example of two men, one of them dumb, who has no power over anything (disbeliever), and he is a burden on his master; whichever way he directs him, he brings no good. Is such a man equal to one (believer in the Islamic Monotheism) who commands justice, and is himself on the Straight Path?

(8) Glorified and Exalted be He! High above (the great falsehood) that they say! (i.e. forged statements that there are other gods along with Allah, but He is Allah, the One, the Self-Sufficient master, Whom all creatures need. He begets not, nor was He begotten, and there is none comparable or coequal unto Him).

(9) Allah puts forth a similitude: a (slave) man belonging to many partners (like those who worship others along with Allah) disputing with one another, and a (slave) man belonging entirely to one master (like those who worship Allah Alone). Are those two equal in comparison? All the praises and thanks be to Allah! But most of them know not.

(10) That is because Allah is the Maula (Lord, master, Helper, Protector, etc.) of those who believe, and the disbelievers have no Maula (lord, master, helper, protector, etc.).