كَتَبَ مُحَمَّدُ بْنُ الْحَسَنِ إِلَى أَبِي مُحَمَّدٍ ع فِي الْمَاءِ الَّذِي يُغَسَّلُ بِهِ الْمَيِّتُ كَمْ حَدُّهُ فَوَقَّعَ ع حَدُّ غُسْلِ الْمَيِّتِ يُغْسَلُ حَتَّى يَطْهُرَ إِنْ شَاءَ اللَّهُ قَالَ وَ كَتَبَ إِلَيْهِ هَلْ يَجُوزُ أَنْ يُغَسَّلَ الْمَيِّتُ وَ مَاؤُهُ الَّذِي يُصَبُّ عَلَيْهِ يَدْخُلُ إِلَى بِئْرِ كَنِيفٍ أَوِ الرَّجُلُ يَتَوَضَّأُ وُضُوءَ الصَّلَاةِ أَنْ يُصَبَّ مَاءُ وُضُوئِهِ فِي كَنِيفٍ فَوَق
“I once wrote to abu Muhammad (a.s.), ‘How much water is needed for Ghusl (bath) of a deceased person?’ The answer came with the signature of the Imam, ‘The amount of water needed is to wash the dead body clean, by the will Allah.’ He (the narrator) has said that he wrote again to him (the Imam) asking, ‘Is it permissi