וְאִם־בֹּ֨א יָבֹ֜א הַכֹּהֵ֗ן וְרָאָה֙ וְ֠הִנֵּה לֹא־פָשָׂ֤ה הַנֶּ֙גַע֙ בַּבַּ֔יִת אַחֲרֵ֖י הִטֹּ֣חַ אֶת־הַבָּ֑יִת וְטִהַ֤ר הַכֹּהֵן֙ אֶת־הַבַּ֔יִת כִּ֥י נִרְפָּ֖א הַנָּֽגַע׃
And if the priest shall come in, and look, and, behold, the plague hath not spread in the house, after the house was plastered; then the priest shall pronounce the house clean, because the plague is healed.
Read halakhic rulings (Jewish law) on Leviticus 14:48: and classical halakhic sources.