He that is wounded in the stones, or hath his privy member cut off, shall not enter into the congregation of the LORD. Deuteronomy 23:1
Trivia: If a married man dies without children, what must his brother do?
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
"Which was the son of Phares, which was the son of Juda."
Judah "went in unto" his daughter-in-law, Tamar, who was disguised as a prostitute. She conceived and
bore Pharez, an ancestor of Jesus. (Gen 38:27-29)
It's a good thing it was more than ten generations ago. Otherwise Jesus could not "enter into the congregation of the
Lord." (Dt.23:2) 3:33