Original sentence: Jizya and kharaj taxes were the largest, and together the predominant contributor to total annual taxes collected by the Muslim officials in various Islamic states,
Edited sentence: Jizya and kharaj taxes were the largest, and together the predominant contributor to total annual taxes collected by the Muslim officials in various Islamic states, and they were a "crushing burden for the non-Muslim peasantry who eked out a bare living in a subsistence economy" according to Norman Stillman