Al-Kāfi - Volume 5 > Milk, Wool and Ghee of Sheep Given for their Maintenance
Hadith #1

1- عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنِ ابْنِ أَبِي عُمَيْرٍ عَنْ حَمَّادٍ عَنِ الْحَلَبِيِّ عَنْ أَبِي عَبْدِ اللهِ (عَلَيْهِ السَّلام) فِي الرَّجُلِ يَكُونُ لَهُ الْغَنَمُ يُعْطِيهَا بِضَرِيبَةٍ سَمْناً شَيْئاً مَعْلُوماً أَوْ دَرَاهِمَ مَعْلُومَةً مِنْ كُلِّ شَاةٍ كَذَا وَكَذَا قَالَ لا بَأْسَ بِالدَّرَاهِمِ وَلَسْتُ أُحِبُّ أَنْ يَكُونَ بِالسَّمْنِ.

1. Ali ibn Ibrahim has narrated from his father from ibn abu ‘Umayr from Hammad from al-Halabiy who has said the following: “About the case of a man who owns sheep and gives them to be maintained and paid for their maintenance from their ghee a certain amount or a known amount of dirham for every sheep, abu ‘ Abd Allah, ‘Alayhi al-Salam, has said, ‘Dirham is not unlawful but I do not like giving ghee.’”