The word(s) "oppress" appears 17 time(s) in 17 verse(s) in Quran in Muhammad Pickthal translation.

(11) And We desired to show favour unto those who were oppressed in the earth, and to make them examples and to make them the inheritors,

(12) Now Korah was of Moses' folk, but he oppressed them; and We gave him so much treasure that the stores thereof would verily have been a burden for a troop of mighty men. When his own folk said unto him: Exult not; lo! Allah loveth not the exultant;

(13) As for that Abode of the Hereafter We assign it unto those who seek not oppression in the earth, nor yet corruption. The sequel is for those who ward off (evil).

(14) (David) said: He hath wronged thee in demanding thine ewe in addition to his ewes, and lo! many partners oppress one another, save such as believe and do good works, and they are few. And David guessed that We had tried him, and he sought forgiveness of his Lord, and he bowed himself and fell down prostrate and repented.

(15) The way (of blame) is only against those who oppress mankind, and wrongfully rebel in the earth. For such there is a painful doom.

(16) And when we heard the guidance, we believed therein, and whoso believeth in his Lord, he feareth neither loss nor oppression.

(17) Therefor the orphan oppress not,