Yahya ibn Yahya narrated to us, saying: I recited to Malik, from Yazid ibn Khusayfah, that al-Sa'ib ibn Yazid informed him that he heard Sufyan ibn Abi Zuhayr—a man from Shanu'ah, among the companions of the Messenger of Allah, peace and blessings be upon him—say: I heard the Messenger of Allah, peace and blessings be upon him, say: "Whoever keeps a dog that does not benefit him in farming or herding, one qirat is deducted from his deeds every day." He said: Did you hear this from the Messenger of Allah, peace and blessings be upon him? He replied: Yes, by the Lord of this mosque.