It is narrated from Hazrat Anas (may Allah be pleased with him) that I used to serve the Prophet (peace and blessings be upon him) and would enter the house of the Prophet (peace and blessings be upon him) without permission. One day, as usual, I entered the house of the Prophet (peace and blessings be upon him), so he said, "Son! A new command has come from Allah, so now do not enter without permission."