4. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from ‘Umar ibn ‘Udhaynah from Zurarah who has said the following: “Abu ‘Abd Allah عليه السلام, has said that it is in the book of Ali عليه السلام, that cats are beasts but there is no offense in using the leftover of what they eat. I feel embarrassed before Allah to throw away a food from which a cat has eaten.’”