٥ـ مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدٍ عَنْ عُثْمَانَ بْنِ عِيسَى عَنِ ابْنِ مُسْكَانَ عَنْ أَبِي بَصِيرٍ قَالَ سَأَلْتُ أَبَا عَبْدِ الله (عَلَيْهِ الْسَّلام) عَنِ الْكُرِّ مِنَ الْمَاءِ كَمْ يَكُونُ قَدْرُهُ قَالَ إِذَا كَانَ الْمَاءُ ثَلاَثَةَ أَشْبَارٍ وَنِصْفٍ [نِصْفاً] فِي مِثْلِهِ ثَلاَثَةِ أَشْبَارٍ وَنِصْفٍ فِي عُمْقِهِ فِي الأرْضِ فَذَلِكَ الْكُرُّ مِنَ الْمَاءِ.
5. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad from ‘Uthman ibn ‘Isa form ibn Muskan from abu Basir who has said the following: “I asked abu ‘Abd Allah , ‘How much is the quantity of one Kur of water?’ He (the Imam) replied, ‘If the size of water is three and a half shibr by three and a half shibr, and three and a half shibr in its depth in the ground, then it is one Kur.’” 