Hadith 5651
Sayyiduna Jabir bin Abdullah (may Allah be pleased with them both) narrates that the Prophet Muhammad (peace be upon him) commanded us to kill dogs, to the extent that if a woman brought a dog from the countryside, it too would be killed. Then the Prophet Muhammad (peace be upon him) forbade us from killing dogs. He said: You must certainly kill the black dog with two spots, for it is a devil.