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They shall not take a wife that is a whore, or profane; neither shall they take a woman put away from her husband: for he is holy unto his God. 21:7
Trivia: In Leviticus 8:23, what does Moses put on Aaron's right ear, thumb, and big toe?
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