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.
Hadith Referenceصحیح ابن حبان / كتاب الحظر والإباحة / 5651
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - «صحيح أبي داود» (2535): م.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرط مسلم