Leviticus 13:19-24
19 If, in the location of the partially healed inflammation, there is left one of the four white spots that can develop into tzara’at, i.e., either a wool-white spot, an egg-membrane-white-spot, a snow-white spot, or a lime-white spot, and the spot is either uniformly white or white with red streaks—but not so many red streaks that the spot loses its white appearance—or uniformly white, he must be shown to the priest.
20 The priest must examine him. If its appearance is, in the case of a snow-white or lime-white spot, lower than that of the skin (due to its shininess), or in the case of a wool-white or egg-membrane-white spot, not any lower than that of the skin (due to its dullness), and at least two of its originally dark hairs have turned white, the priest must pronounce him defiled, for the transmutation of dark hairs into white indicates that this spot is a tzara’at-lesion that has erupted on the inflammation.
21 But if, when the priest examines it, it does not contain newly white hair, and its appearance is, in the case of a snow-white or lime-white spot, lower than that of the skin, or in the case of a wool-white or egg-membrane-white spot, not any lower than that of the skin because it is darker than a snow-white or lime-white spot, the priest must quarantine him for seven days.
22 If, when the priest examines him at the end of the quarantine week, he sees that it has spread on the skin—covering more (but not all) of the body—or at least two of its previously dark hairs have turned white, the priest must pronounce him defiled, for it is now clear that this spot is a tzara’at-lesion.
23 If the snow-white spot or other spot remained the same size, not having spread, and it became darker than it was before (even though it has not darkened to the extent that it no longer exhibits one of the four degrees of whiteness that can develop into tzara’at), it is only the scar tissue of the inflammation, and the priest must pronounce him rid of this defilement. No second week of quarantine is required.
Unlike lesions that develop on healthy skin, the appearance of healthy flesh within a lesion that develops on an inflammation does not indicate defilement.
Tzara’at that Develops out of a Burn
Fourth Reading (Second when combined) 24 If tzara’at develops out of a partially healed burn, the rules of diagnosis are the same as when it develops out of an inflammation (see Figure 3, page 97):
This type of tzara’at can only develop on a person’s flesh if there is a burn on its skin resulting from contact with fire or something hot, and the healed area of the burn has begun to form a membrane. (In contrast, a fully healed burn is considered normal skin—even if it leaves scar tissue—on which tzara’at can only develop out of a white lesion, as described above.) If such a partially healed burn turns into a snow-white spot or one of the three other types of white spots that can develop into tzara’at, and the spot is either white with red streaks—but not so many red streaks that the spot loses its white appearance—or uniformly white, he must be shown to the priest.