Al-Kāfi - Volume 6 > The Dogs
Hadith #4

مُحَمَّدُ بْنُ يَحْيَى عَنْ أَحْمَدَ بْنِ مُحَمَّدِ بْنِ عِيسَى عَنْ يُوسُفَ بْنِ عَقِيلٍ عَنْ مُحَمَّدِ بْنِ قَيْسٍ عَنْ أَبِي جَعْفَرٍ ( عليه السلام ) قَالَ قَالَ أَمِيرُ الْمُؤْمِنِينَ ( صلوات الله عليه ) لَا خَيْرَ فِي الْكِلَابِ إِلَّا كَلْبَ صَيْدٍ أَوْ كَلْبَ مَاشِيَةٍ .

4. Muhammad ibn Yahya has narrated from Ahmad ibn Muhammad ibn ‘Isa from Yusuf ibn ‘Aqil from Muhammad ibn Qays who has said the following: “Abu Ja‘far, ‘Alayhi al-Salam, has said that ’Amir al-Mu’minin has said, ‘There is nothing good in dogs except hunting dogs or that which guards cattle.’”