Leviticus 14:46

Moreover, he that goeth into the house all the while it is
shut up
The utmost of which were three weeks, as Jarchi observes; during the time a house was shut up, no man might enter it: if he did, he shall be unclean until the evening;
might not have any conversation with men until the evening was come, and he had washed himself; nay, according to the Misnah ^F17, if a clean person thrust in his head, or the greatest part of his body, into an unclean house, he was defiled; and whoever entered into a leprous house, and his clothes are on his shoulder, and his sandals (on his feet), and his rings on his hands, he and they are unclean immediately; and if he has his clothes on, and his sandals on his feet, and his rings on his hands, he is immediately defiled, and they are clean.