There is no harm if a blind or a lame or a sick person (takes a meal at another's house): nor is there any harm for yourselves if you take meals at your own houses or at the houses of your fathers and grandfathers or at the houses of your mothers and grandmothers or at your brothers' houses or at your sisters' houses or at the houses of your paternal uncles or at the houses of your paternal aunts or at the houses of your maternal uncles or at the houses of your maternal aunts or from the houses whose keys are in your possession or at the houses of your friends. There is no harm if you take your meals together or separately; however, when you enter the houses, you should send greetings of peace on your people, for the prayer of greetings prescribed by Allah is blessed and pure. Thus Allah makes His Revelation's clear to you. It is expected that you will use your common sense to grasp these.