Deuteronomy 22:30
A man shall not take his father’s wife, and shall not uncover his father’s skirt.
World English Bible (Public Domain)
In context
Before · Deuteronomy 22:28–29
28If a man finds a lady who is a virgin, who is not pledged to be married, grabs her and lies with her, and they are found, 29then the man who lay with her shall give to the lady’s father fifty shekels of silver. She shall be his wife, because he has humbled her. He may not put her away all his days.
30A man shall not take his father’s wife, and shall not uncover his father’s skirt.