Narrated to us Abu Khaythamah, Zuhayr ibn Harb, and Muhammad ibn al-Muthanna al-ʿAnazi — and the wording is that of Ibn al-Muthanna — they said: Narrated to us Yahya, and he is Ibn Saʿid al-Qattan, from ʿUbaydullah: Nafiʿ informed me, from Ibn ʿUmar, that the Messenger of Allah, peace and blessings be upon him, said: "It is not right for any Muslim man who has something he wishes to make a bequest of, to spend two nights without his will being written down with him."