Leviticus 13:46

All the days wherein the plague shall be in him he shall be defiled, the Law thus, with all its strictness, taking into consideration a possible recovery of the leper; he is unclean; he shall dwell alone, in order to avoid contact with healthy people; without the camp shall his habitation be. Cf Numbers 5:2; Numbers 12:14; 2 Kings 15:5; Luke 17:12. In Palestine the lepers lived outside the city walls, but they were permitted to attend the synagogs in a place set apart for them, the Law demanding, however, that they come after the opening of services and leave in such a way as not to come in contact with healthy persons.