Leviticus 13:34-36

Amplified Bible

³⁴ Then on the seventh day the priest shall look at the scale; if the scale has not spread on the skin and appears to be no deeper than the skin, the priest shall pronounce him clean; he shall wash his clothes and be clean. ³⁵ But if the scale spreads farther on the skin after his cleansing, ³⁶ then the priest shall examine him, and if the scale has spread on the skin, the priest need not look for the yellowish hair; he is unclean.