en_tn/lev/13/53.md

then he will command them

"then the priest will command the owners"

in which the mildew was found

AT: "in which the priest found the mildew" (See: rc://en/ta/man/translate/figs-activepassive)

after the mildewed item was washed

AT: "after they washed the mildewed item"

You must burn the item

Here "you" does not mean Moses or Aaron specifically. It just means someone must burn the object.