حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ الْأُمَوِيُّ حَدَّثَنَا عُبَيْدُ اللَّهِ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ قَالَ مَا حَقُّ امْرِئٍ مُسْلِمٍ لَهُ شَيْءٌ يُوصِي فِيهِ يَبِيتُ لَيْلَتَيْنِ إِلَّا وَوَصِيَّتُهُ عِنْدَهُ مَكْتُوبَةٌ
مسند امام احمد بن حنبل · Hadith 5511
It was narrated from Ibn 'Umar that the Messenger of Allah (PBUH) said: "It is not right for a Muslim man who has anything that he may want to bequeath, to stay for more than two nights without having his will written with him."
Sanad
حَدَّثَنَا يَحْيَى بْنُ سَعِيدٍ الْأُمَوِيُّ حَدَّثَنَا عُبَيْدُ اللَّهِ عَنْ نَافِعٍ عَنِ ابْنِ عُمَرَ