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It is a freckled spot that groweth in the skin; he is clean. 13:39
Trivia: What two things are you not allowed to eat according the "perpetual statute" given in Leviticus 3:17?
Notice that in this long list of relatives that you may not have sex with, there is one relative that is not mentioned -- your daughter. Nowhere in this list, or anywhere else in the bible, is sex between a man and his daughter (or, more generally, between parent and child) forbidden. 18:6-18, 20