Narrator:Abdullāh ibn ‘Umar
عَنِ ابْنِ عُمَرَ رَضِيَ اللَّهُ عَنْهُ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «مَا حَقُّ امْرِئٍ مُسْلِمٍ لَهُ شَيْءٌ يُوصَى فِيهِ يَبِيتُ لَيْلَتَيْنِ إِلَّا وَوَصِيَّة مَكْتُوبَة عِنْده»
Wills. Ibn ‘Umar reported God’s Messenger as saying, “It is the duty of a Muslim man who has something which is to be given as a bequest not to have it for two nights without having his will written regarding it.” (Bukhari and Muslim.)
Reported by Al-Bukhari (No. 2738), Muslim (No. 1627a, 1627c, 1627d, 1627e), Abu Dawud (No. 2862), At-Tirmidhi (No. 974, 2118), An-Nasa’i (No. 3615, 3616, 3618, 3619), Ibn Majah (No. 2699, 2702), Malik (No. 1458), Ahmad (No. 4239, 4350, 4667, 4872, 4950, 5254, 5256, 5660) and Ad-Darimi (No. 3046). Cited in Mishkat al-Masabih (No. 3070).