0
The stranger that dwelleth with you shall be unto you as one born among you, and thou shalt love him as thyself. 19:34
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