John Gill Commentary Leviticus 13:34

"and in the seventh day the priest shall look on the scall; and, behold, if the scall be not spread in the skin, and the appearance thereof be not deeper than the skin; then the priest shall pronounce him clean: and he shall wash his clothes, and be clean." — Leviticus 13:34 (ASV)

And in the seventh day the priest shall look on the scall ,
&c.] That is, according to Ben Gersom, on the thirteenth day from the first inspection of him by the priest: and, behold, [if] the scall be not spread in the skin, nor [be] in
sight deeper than the skin ;
neither appears spread on the surface of the skin, nor to have eaten into the flesh under it; also no thin yellow hair, though it is not expressed, for that made a person unclean, though there was no spreading: then the priest shall pronounce him clean ;
free from a leprosy: and he shall wash his clothes, and be clean ;
there was no need to say he shall wash them in water, as Aben Ezra observes, that is supposed; and then he was looked upon as a clean person, and might go into the sanctuary, and have conversation with men, both in a civil and religious way, and not defile anything he sat upon.