It is narrated from Sayyiduna Ibn Mas'ud (may Allah be pleased with him) that once we asked the Prophet (peace and blessings be upon him): "Are these monkeys and pigs from among the descendants of the Jews?" The Prophet (peace and blessings be upon him) replied: "Whenever Allah cursed a people and transformed their forms, He did not leave any offspring of theirs after destroying them. Rather, this creation already existed before; when Allah's wrath descended upon the Jews and He transformed their forms, He made them like these."