Leviticus 14:37

14:37 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;
-World English Bible

Other Translation

14:37 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;
-King James Version