There is no (such) restriction for the blind, nor for one born lame, nor for one struck with illness, nor (is there any restriction) for yourselves, if you eat in your own houses, or the houses of your fathers, or the houses your mothers, or the houses your brothers, or the houses your sisters, or your the houses father's brothers, or the houses your father's sisters, or the houses your mother's sisters, or in houses whose keys you have, or in the houses of a sincere friend of yours: There is no blame on you, whether you eat in company or alone. But when you enter houses, greet yourselves (and each other)— A greeting of blessing and purity as from Allah. Thus Allah makes the Signs clear to you: That you may understand.