Joseph ben Nissim Kaṣabi (Qaṣṣabi) (ca. 1625-ca. 1690) was a rabbi and scholar in the Ottoman Empire. Born in Istanbul around 1625 and educated at the yeshiva of Joseph ben Moses Ṭrani (Miṭrani) the Elder (1569–1639), Kaṣabi was one of the foremost religious teachers in the Ottoman capital and often sought to obtain the agreement of other prominent rabbis on matters that he taught his students. He maintained a close friendship with Abraham ben Meʾir Rosanes (ca. 1635–1720) and corresponded with other important rabbinical figures of the time, receiving queries on hal…