Mustadrak al-Hakim — Hadith 581

It is narrated from Sayyiduna Abu Hurayrah (may Allah be pleased with him) that the Messenger of Allah (peace and blessings be upon him) said: "The purification of your vessel, when a dog has licked from it, is that it be washed seven times, the first of them with earth." Then Sayyiduna Abu Hurayrah (may Allah be pleased with him) mentioned the cat; (the narrator says:) I do not remember whether he said once or twice. Nasr bin Ali says: I found in my father's book, in another place, that the narration about the dog is marfu' (the saying of the Prophet (peace and blessings be upon him)), while the narration about the cat is mawquf (the saying of the Companion).