he wronged / he oppressed
Form I verb. Past: ظَلَمَ, Present: يَظْلِمُ. Related: ظُلْمٌ (injustice), ظَالِمٌ (wrongdoer), مَظْلُومٌ (oppressed). Active participle often used as noun.
Ẓulm (injustice) is one of the greatest sins in Islam. God declares in a hadith qudsi: 'I have forbidden ẓulm for Myself and made it forbidden among you.'