"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.'"
Sunan an-Nasa'i Book 30, Hadith 5
← Previous Hadith "A man made a will leaving some Dinars (to be spent) in the cause of Allah. Abu Ad-Darda' was asked about that, and he narrated that the Prophet said: 'The likeness of the one who frees a slave or gives some charity when he is dying, is that of a man who gives a gift after he has eaten his fill.'"

Sunan an-Nasa'i Book 30, Hadith 4 Next Hadith → "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."

Sunan an-Nasa'i Book 30, Hadith 6