The word(s) "slave" appears 166 time(s) in 153 verse(s) in Quran in Mohsin Khan translation.

(41) He sends down the angels with the Ruh (revelation) of His Command to whom of His slaves He wills (saying): "Warn mankind that La ilaha illa Ana (none has the right to be worshipped but I), so fear Me (by abstaining from sins and evil deeds).

(42) And Allah has preferred some of you above others in wealth and properties. Then, those who are preferred will by no means hand over their wealth and properties to those (slaves) whom their right hands possess, so that they may be equal with them in respect thereof . Do they then deny the Favour of Allah?

(43) Allah puts forward the example of (two men - a believer and a disbeliever); a slave (disbeliever) under the possession of another, he has no power of any sort, and (the other), a man (believer) on whom We have bestowed a good provision from Us, and he spends thereof secretly and openly. Can they be equal? (By no means). All the praises and thanks are to Allah. Nay! (But) most of them know not.

(44) Glorified (and Exalted) be He (Allah) [above all that (evil) they associate with Him] Who took His slave (Muhammad صلى الله عليه و سلم) for a journey by night from Al-Masjid-al-Haram (at Makkah) to Al-Masjid-al-Aqsa (in Jerusalem), the neighbourhood whereof We have blessed, in order that We might show him (Muhammad صلى الله عليه و سلم) of Our Ayat (proofs, evidence, lessons, signs, etc.). Verily, He is the All-Hearer, the All-Seer .

(45) "O offspring of those whom We carried (in the ship) with Nuh (Noah)! Verily, he was a grateful slave."

(46) So, when the promise came for the first of the two, We sent against you slaves of Ours given to terrible warfare. They entered the very innermost parts of your homes. And it was a promise (completely) fulfilled.

(47) And how many generations have We destroyed after Nuh (Noah)! And Sufficient is your Lord as an All-Knower and All-Beholder of the sins of His slaves.

(48) Truly, your Lord enlarges the provision for whom He wills and straitens (for whom He wills). Verily, He is Ever All-Knower, All-Seer of His slaves.

(49) And say to My slaves (i.e. the true believers of Islamic Monotheism) that they should (only) say those words that are the best. (Because) Shaitan (Satan) verily, sows a state of conflict and disagreements among them. Surely, Shaitan (Satan) is to man a plain enemy.

(50) "Verily, My slaves (i.e. the true believers of Islamic Monotheism) - you have no authority over them. And All-Sufficient is your Lord as a Guardian."