Sahih Muslim 4204
صحيح مسلم#4204SahihIbn Umar (Allah be pleased with them) reported Allah's Messenger (ﷺ) as saying:It is the duty of a Muslim who has something which is to be given as a bequest not to have it for two nights without having his will written down regarding it
Scholarly Authentication
We show the most cautious grade (weakest-wins) as the overall label. Individual scholars graded it as follows:
Every narration in Sahih Muslim is accepted as Sahih (authentic) by the established status of the book.
In-book reference: 25:1