Cross reference
Lamentations 4:15
15 They cried unto them, Depart ye; it is unclean; depart, depart, touch not: when they fled away and wandered, they said among the heathen, They shall no more sojourn there.
Leviticus 13:45-46
45 And the leper in whom the plague is, his clothes shall be rent, and his head bare, and he shall put a covering upon his upper lip, and shall cry, Unclean, unclean.
46 All the days wherein the plague shall be in him he shall be defiled; he is unclean: he shall dwell alone; without the camp shall his habitation be.