Leviticus 14:37

And he shall look on the plague, and, behold, [if] the plague is in the walls of the house, [he will see] greenish or reddish cavities, and the appearance of them [will be] beneath the surface of the walls.

And he shall look on the plague, and, behold, if the plague be in the walls of the house with hollow strakes, greenish or reddish, which in sight are lower than the wall;

He shall examine the plague; and behold, if the plague is in the walls of the house with hollow streaks, greenish or reddish, and it appears to be deeper than the wall,