Leviticus 15:24

He shall be unclean seven days, if he did this unwitingly; but if the man and woman did this knowingly, this was a gross sin, Ezekiel 18:6; and they being accused and convicted were punished with death, Leviticus 20:18; for as there was a turpitude in the action, so it was very prejudicial to the children then begotten, who were commonly weak, or leprous, or otherwise disordered; which was also an injury to the commonwealth of Israel, and redounded to the dishonour of God, and of the true religion, that the professors thereof gave such public evidence of their intemperance.