Musnad Ahmad 5:703

Abdullah narrated to us, Abu Salam Khalil ibn Salam narrated to us, Abd al-Warith narrated to us, from al-Hasan ibn Dhakwan, from Amr ibn Khalid, from Habib ibn Abi Thabit, from Asim ibn Damrah, from Ali: That Gabriel came to the Prophet, may Allah bless him and grant him peace, and said: "We do not enter a house in which there is an image or a dog." And there was a dog belonging to al-Hasan in the house.