וְיָצָ֧א הַכֹּהֵ֛ן מִן־הַבַּ֖יִת אֶל־פֶּ֣תַח הַבָּ֑יִת וְהִסְגִּ֥יר אֶת־הַבַּ֖יִת שִׁבְעַ֥ת יָמִֽים׃
then the priest shall go out of the house to the door of the house, and shut up the house seven days.
Read kabbalistic (mystical) interpretation of Leviticus 14:38: and classical mystical sources.