I heard Allah's Messenger (ﷺ) saying; "Angels (of Mercy) do not enter a house wherein there is a dog or a picture of a living creature (a human being or an animal).

That Zaid bin Khalid Al-Juhani narrated to him something in the presence of Sa`id bin 'Ubaidullah Al- Khaulani who was brought up in the house of Maimuna the wife of the Prophet. Zaid narrated to them that Abu Talha said that the Prophet (ﷺ) said, "The Angels (of Mercy) do not enter a house wherein there is a picture." Busr said, "Later on Zaid bin Khalid fell ill and we called on him. To our surprise we saw a curtain decorated with pictures in his house. I said to Ubaidullah Al-Khaulani, "Didn't he (i.e. Zaid) tell us about the (prohibition of) pictures?" He said, "But he excepted the embroidery on garments. Didn't you hear him?" I said, "No." He said, "Yes, he did."

Once Gabriel promised the Prophet (that he would visit him, but Gabriel did not come) and later on he said, "We, angels, do not enter a house which contains a picture or a dog."