Leviticus 14:37
He is to examine the house, and if the mildew on the walls consists of green or red depressions that appear to be beneath the surface of the wall,
Berean Standard Bible
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,