‏الوصية : Hadeeth No:3987 Ibn Umar (Allaah be pleased with them) reported Allaah's Messenger (sallAllaahu alayhi wa sallam) 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....

‏الفضائل : Hadeeth No:5693 This hadith has been narrated on the authority of Hudhaifa through another chain of transmitters....