Leviticus 17:14
For it is the life of all flesh; the blood of it is for the life thereof: therefore I said unto the children of Israel, Ye shall eat the blood of no manner of flesh: for the life of all flesh is the blood thereof: whosoever eateth it shall be cut off.
Leviticus 18:18
Neither shalt thou take a wife to her sister, to vex her, to uncover her nakedness, beside the other in her life time.