No restriction is there upon the blind , nor is there the restriction upon a lame , nor is there a restriction upon the sick. nor upon yourselves that ye eat in your houses or the houses of your fathers or the houses of your mothers or the houses of your brothers or the houses of your sisters or the houses of your fathers brothers or the houses of your fathers sisters or the houses of your mothers brothers or the houses of your mothers sisters or from that house where of ye own the keys or from the house of a friend . No fault is there upon you whether ye eat together or in separate groups , Then when ye enter houses , salute each other with a greeting from before Allah , blest and goodly .