Sufyan bin Sa‘id Ath-Thawri سفيان الثوري · The Book of Wills

"It is not right for a Muslim who has anything concerning which a will should be made, to abide for more than three nights without having a written will with him."

"I asked Ibn Abi Awfa: 'Did the Messenger of Allah leave a will?' He said: 'No.' I said: 'How come it is prescribed for the Muslims to make wills?' He said: 'He left instructions urging the Muslims to adhere to the Book of Allah.'"

"The Messenger of Allah said, when the Verse: 'And warn your tribe (O Muhammad) of near kindred.' was revealed: 'O Quraish! Buy your souls from your Lord; I cannot avail you anything before Allah. O Banu 'Abdul-Muttalib! I cannot avail you anything before Allah. O 'Abbas bin 'Abdul-Muttalib! I cannot avail you anything before Allah. O Safiyyah, paternal aunt of the Messenger of Allah! I cannot avail you anything before Allah. O Fatimah bint Muhammad! Ask me for whatever you…

"I came to the Messenger of Allah and said: 'My mother left a will saying that a slave should be freed on her behalf. I have a Nubian slave girl; will it suffice if I free her on her behalf?' He said: 'Bring her here.' The Prophet said to her: 'Who is your Lord?' She said: 'Allah.' He said: 'Who am I?' She said: 'The Messenger of Allah.' He said: 'Set her free , for she is a believer.'"