Whosoever ... giveth any of his seed unto Molech; he shall surely be put to death: the people of the land shall stone him with stones. 20:2
Trivia: What is the biblically correct way to kill a man or women with a "familiar spirit"?
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