"It is not right for a Muslim man to spend two nights, having what he would will, without having his will written with him."  

قَالَ النَّبِيُّ ﷺ مَا حَقُّ امْرِئٍ مُسْلِمٍ يَبِيتُ لَيْلَتَيْنِ وَلَهُ مَا يُوصِي فِيهِ إِلاَّ وَوَصِيَّتُهُ مَكْتُوبَةٌ عِنْدَهُ