Islamic etiquettes with regards to answering the door
Q: What is the Islamic etiquette with regards to answering the door when someone knocks. Some people don't answer the door or delay for quite some time before answering the door for no reason at all. In some cases if the person is eating or reading Qur'an, etc, he doesn't answer the door or delays unnecessarily. The person doesn't even announce to the knocker informing him that he has heard him. Is this not inconveniencing the visitors? Please explain the correct conduct and etiquette.