17. Ali ibn Ibrahim has narrated from his father from Ibn Abi ‘Umayr from ‘Ammar ibn Marwan who has narrated the following: “I once said to abu ‘Abd Allah عليه السلام, ‘My father was about to die and he was told to make a will.’ He said, ‘This is my son, meaning, ‘Umar. Whatever he does is permissible.’ Abu ‘Abd Allah عليه السلام, said to him, ‘Your father has made a will and has made it concise.’ I said, ‘He has designated for you such and such amount.’ He (the Imam) said, ‘You can execute it.’ I then said that he made a will to free a believing well-informed slave but when we freed it was found out that the slave was born out of wedlock.’ He (the Imam) said, ‘It is sufficient. It is like one who buys an animal for sacrificial offering thinking that it is healthy, but finds it out to be skinnier but it is sufficient to meet the legal requirement.’”