It is narrated from Hazrat Aisha (may Allah be pleased with her). She says that Hazrat Jibreel had promised the Noble Prophet Muhammad (peace and blessings be upon him) to come at a certain time, but he was delayed from that time. So the Noble Prophet Muhammad (peace and blessings be upon him) came outside and at that time Hazrat Jibreel was found standing at the door. The Prophet (peace and blessings be upon him) said to him, "What prevented you from entering?" He said, "There is a dog in the house, and we do not enter a house in which there is a dog or a picture."