Imam Ali (AS) said, Five [types of people] are worthy of being humiliated: The one who interferes between two people when they have not involved him in their affair, the one who issues commands to the owner of the house [while] in his house, the one who approaches a dining table when he has not been invited to do so, the one who continues talking when nobody is listening and the one who sits in the place where he has no right to sit.