Leviticus 14:37-39

American Standard Version

³⁷ and he shall look on the plague; and, behold, if the plague be in the walls of the house with hollow streaks, greenish or reddish, and the appearance thereof be lower than the wall; ³⁸ then the priest shall go out of the house to the door of the house, and shut up the house seven days. ³⁹ And the priest shall come again the seventh day, and shall look; and, behold, if the plague be spread in the walls of the house;