Al-Kāfi - Volume 6 > The Milk Products from Cows
Hadith #2

عِدَّةٌ مِنْ أَصْحَابِنَا عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ خَالِدٍ عَنْ يَحْيَى بْنِ إِبْرَاهِيمَ بْنِ أَبِي الْبِلَادِ عَنْ أَبِيهِ عَنْ جَدِّهِ قَالَ شَكَوْتُ إِلَى أَبِي جَعْفَرٍ ( عليه السلام ) ذِرْباً وَجَدْتُهُ فَقَالَ لِي مَا يَمْنَعُكَ مِنْ شُرْبِ أَلْبَانِ الْبَقَرِ فَقَالَ لِي أَ شَرِبْتَهَا قَطُّ فَقُلْتُ لَهُ نَعَمْ مِرَاراً فَقَالَ كَيْفَ وَجَدْتَهَا فَقُلْتُ وَجَدْتُهَا تَدْبُغُ الْمَعِدَةَ وَ تَكْسُو الْكُلْيَتَيْنِ الشَّحْمَ وَ تُشَهِّي الطَّعَامَ فَقَالَ لِي لَوْ كَانَتْ أَيَّامُهُ لَخَرَجْتُ أَنَا وَ أَنْتَ إِلَى يَنْبُعَ حَتَّى نَشْرَبَهُ .

2. A number of our people have narrated from Ahmad ibn Muhammad ibn Khalid, from Yahya ibn Ibrahim ibn abu al-Balad, from his father from his grandfather who has said the following: “I once complained before abu Ja‘far, ‘Alayhi al-Salam, about stomach trouble and he (the Imam) said, ‘What prevents you from drinking cow milk, have you ever drank it before?’ I replied, ‘Yes, many times.’ He (the Imam) asked, ‘How did you find it?’ I replied, ‘It tans the stomach, covers the kidneys with fat and increases one’s appetite for food.’ He (the Imam) then said, ‘Had it been the right time, you and I could have gone to Yanba’ so we could drink milk.’”