Narrated Abdullah bin Umar: The Messenger of Allah ﷺ as saying: It is the duty of a Muslim man who has something which is to be given as bequest not to have it for two nights without having his will written regarding it.
Hadith Referenceسنن ابي داود / كتاب الوصايا / 2862
Hadith Gradingالألبانی:صحيح | زبیر علی زئی:صحيح بخاري (2738) صحيح مسلم (1627)