The Prophet (ﷺ) said, "Whoever keeps a (pet) dog which is neither a watch dog nor a hunting dog, will get a daily deduction of two Qirat from his good deeds."
Sahih al-Bukhari Book 72, Hadith 6
← Previous Hadith that he saw a man throwing stones with two fingers (at something) and said to him, "Do not throw stones, for Allah's Messenger (ﷺ) has forbidden throwing stones, or he used to dislike it." `Abdullah added: Throwing stones will neither hunt the game, nor kill (or hurt) an enemy, but it may break a tooth or gouge out an eye." Afterwards `Abdullah once again saw the man throwing stones. He said to him, "I tell you that Allah's Messenger (ﷺ) has forbidden or disliked the throwing the stones (in such a way), yet you are throwing stones! I shall not talk to you for such-and-such a period."

Sahih al-Bukhari Book 72, Hadith 5 Next Hadith → I heard the Prophet (ﷺ) saying, "If someone keeps a dog neither for hunting, nor for guarding livestock, the reward (for his good deeds) will be reduced by two Qirats per day."

Sahih al-Bukhari Book 72, Hadith 7