It is narrated from Sayyiduna Sufyan bin Zuhair, may Allah be pleased with him, and he was a man from the tribe of Shanū’ah and a companion of the Messenger of Allah, peace and blessings be upon him, and he was relating hadith to the people at the door of the Prophet’s Mosque. He said: I heard the Messenger of Allah, peace and blessings be upon him, say:“Whoever keeps a dog, not for the purpose of guarding crops nor for guarding sheep, then every day there will be a decrease and loss in his deeds equal to one qirat.”Sa’ib bin Yazid asked Sayyiduna Sufyan, may Allah be pleased with him: Did you hear this from the Messenger of Allah, peace and blessings be upon him? He said: Yes, by the Lord of this mosque.

It is narrated from Sayyiduna Abdullah bin Umar (may Allah be pleased with them both) that the Messenger of Allah (peace and blessings be upon him) said: "Whoever keeps a dog, except a hunting dog or a dog for the fields, then every day there will be a reduction and loss of two qirats from his deeds."

It is narrated from Sayyiduna Abdullah bin Umar, may Allah be pleased with him, that the Messenger of Allah, peace and blessings be upon him, ordered the killing of dogs.