٢٢- عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ سَهْلِ بْنِ زِيَادٍ عَنْ مُعَاوِيَةَ بْنِ حُكَيْمٍ عَنْ أَبِي شُعَيْبٍ الْمَحَامِلِيِّ الرِّفَاعِيِّ قَالَ سَأَلْتُ أَبَا عَبْدِ اللهِ (عَلَيْهِ السَّلام) عَنْ رَجُلٍ قَبَّلَ رَجُلا أَنْ يَحْفِرَ لَهُ بِئْراً عَشْرَ قَامَاتٍ بِعَشَرَةِ دَرَاهِمَ فَحَفَرَ لَهُ قَامَةً ثُمَّ عَجَزَ قَالَ يُقْسَمُ عَشَرَةٌ عَلَى خَمْسَةٍ وَخَمْسِينَ جُزْءاً فَمَا أَصَابَ وَاحِداً فَهُوَ لِلْقَامَةِ الأولَى وَالاثْنَانِ لِلثَّانِيَةِ وَالثَّلاثَةُ لِلثَّالِثَةِ عَلَى هَذَا الْحِسَابِ إِلَى عَشَرَةٍ.
22. A number of our people have narrated from Sahl ibn Ziyad from Mu‘awiyah ibn Hakim from ibn Shu’ayb al-Muhamiliy al-Rifa‘iy who has said the following: “I once asked abu ‘ Abd Allah , about the case of a man who hires a man to dig for him a well as deep as ten times the height of a man for ten dirham; but then he fails to do so because of weakness. He (the Imam) said, ’Ten must be divided into fifty-five of which one is for the first length, two for the second and three for the third in the same way until the tenth.’” 