١٠- أَحْمَدُ بْنُ مُحَمَّدٍ عَنْ مُحَمَّدِ بْنِ سَهْلٍ عَنْ أَبِيهِ عَنْ عَبْدِ اللهِ بْنِ بُكَيْرٍ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) قَالَ سَأَلْتُهُ عَنْ رَجُلٍ يُزْرَعُ لَهُ الزَّعْفَرَانُ فَيَضْمَنُ لَهُ الْحَرَّاثُ عَلَى أَنْ يَدْفَعَ إِلَيْهِ مِنْ كُلِّ أَرْبَعِينَ مَنَا زَعْفَرَانٍ رَطْبٍ مَنًا وَيُصَالِحُهُ عَلَى الْيَابِسِ وَالْيَابِسُ إِذَا جُفِّفَ يَنْقُصُ ثَلاثَةُ أَرْبَاعِهِ وَيَبْقَى رُبُعُهُ وَقَدْ جُرِّبَ قَالَ لا يَصْلُحُ قُلْتُ وَإِنْ كَانَ عَلَيْهِ أَمِينٌ يُحْفَظُ بِهِ لَمْ يَسْتَطِعْ حِفْظَهُ لأنَّهُ يُعَالِجُ بِاللَّيْلِ وَلا يُطَاقُ حِفْظُهُ قَالَ يُقَبِّلُهُ الأرْضَ أَوَّلا عَلَى أَنَّ لَكَ فِي كُلِّ أَرْبَعِينَ مَنًا مَنًا. 
10. Ahmad ibn Muhammad from has narrated from Muhammad ibn Sahl from his father from ‘ Abd Allah ibn Bukayr who has said the following: “This is concerning my question before abu ‘Abd Allah , about the case of a man for whom saffron was cultivated and the farmers guaranteed to give him one Mann (a certain unit of weight) out of every forty Mann fresh saffron and made a settlement about the dried saffron. Dried saffron reduces by three-fourth from fresh kind and one-fourth remains and this is experimented. He (the Imam) said, ‘It is not valid.’ I then said, ‘If he appoints trusted people for protection, he cannot do so because it is worked upon during the night, it is not difficult to protect.’ He (the Imam) said, ‘He can contract the land first in which he must say that from every forty Mann it is one Mann .’” 