The word(s) "oppressor" appears 4 time(s) in 4 verse(s) in Quran in Muhammad Pickthal translation.

(1) This is on account of that which your own hands have sent before (you to the judgment). Allah is no oppressor of (His) bondmen.

(سورة آل عمران, Aal-i-Imraan, Chapter #3, Verse #182)
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(2) How should ye not fight for the cause of Allah and of the feeble among men and of the women and the children who are crying: Our Lord! Bring us forth from out this town of which the people are oppressors! Oh, give us from thy presence some protecting friend! Oh, give us from Thy presence some defender!

(سورة النساء, An-Nisaa, Chapter #4, Verse #75)
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(3) (And unto him it will be said): This is for that which thy two hands have sent before, and because Allah is no oppressor of His slaves.

(سورة الحج, Al-Hajj, Chapter #22, Verse #10)
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(4) For reminder, for We never were oppressors.

(سورة الشعراء, Ash-Shu'araa, Chapter #26, Verse #209)
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