(1) باب الْكَرَاهِيَةِ فِي تَأْخِيرِ الْوَصِيَّةِ
It was narrated that Ibn 'Umar said:
"The Messenger of Allah said: 'It is not befitting for a Muslim who has anything concerning which a will should be made, to abide for two nights without having a written will with him.'" (RU)
Reference (RU): Sunan an-Nasa'i 3615 (RU)
In-book reference (RU): Book 30, Hadith 5 (RU)
English translation (RU): Vol. 4, Book 30, Hadith 3645 (RU)