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Nega'im 13:4:
בַּיִת הַמֻּסְגָּר, מְטַמֵּא מִתּוֹכוֹ. וְהַמֻּחְלָט, מִתּוֹכוֹ וּמֵאֲחוֹרָיו. זֶה וָזֶה מְטַמְּאִין בְּבִיאָה:
A house that has been isolated conveys uncleanness from its inside; And one that has been certified unclean, both from its inside and from its outside. Both conv...