Allah's Messenger (ﷺ) said, "Whoever keeps a dog, one Qirat of the reward of his good deeds is deducted daily, unless the dog is used for guarding a farm or cattle." Abu Huraira (in another narration) said from the Prophet, "unless it is used for guarding sheep or farms, or for hunting." Narrated Abu Hazim from Abu Huraira: The Prophet (ﷺ) said, "A dog for guarding cattle or for hunting."

Abu Sufyan bin Abu Zuhair, a man from Azd Shanu'a and one of the companions of the Prophet (ﷺ) said, "I heard Allah's Messenger (ﷺ) saying, 'If one keeps a dog which is meant for guarding neither a farm nor cattle, one Qirat of the reward of his good deeds is deducted daily." I said, "Did you hear this from Allah's Messenger (ﷺ)?" He said, "Yes, by the Lord of this Mosque."