Al-Kāfi - The Book of Food

Chapter: Things Inedible in Sheep and other Animals سَهْلُ بْنُ زِيَادٍ عَنْ بَعْضِ أَصْحَابِنَا أَنَّهُ كَرِهَ الْكُلْيَتَيْنِ وَ قَالَ إِنَّ٠6.

Sahl ibn Ziyad has narrated from certain persons of our people who have said the following: “He (the Imam) (a.s.), disliked the kidneys and said that they are the collectors of urine.’” شهور - Allamah Baqir al-Majlisi (Mirʾāt al-ʿUqūl fī Sharḥ Akhbār Āl al-Rasūl (2/47))