en_tn/lev/13/56.md

after it was washed

AT: "after the owner washed it" (See: rc://en/ta/man/translate/figs-activepassive)

You must burn

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

if you wash the item

"if the owner washes it"

then the item must be washed

AT: "then the owner must wash it"