It was narrated that Ibn Mas'ood (رضي الله عنه) said:

We asked The Messenger of Allah (ﷺ) about monkeys and pigs - were they the offspring of the Jews? The Messenger of Allah said: "It never happened that Allah cursed any people and transformed them, and they had offspring until they died. These (animals) are a creation that existed before. But Allah, may He be glorified and exalted, got angry with the Jews, so He transformed them and made them like them.”