Leviticus 18:8

You must not have sexual intercourse with your father’s wife; she is your father’s nakedness. ¹ 

Ge 35:22; Ge 49:4; Le 20:11; De 22:30; De 27:20; 2Sa 16:21,22; Eze 22:10; Am 2:7; 1Co 5:1

¹ tn Heb “the nakedness of your father she is.” See the note on v. 7 above. This law refers to another wife of the man’s father, who is not that man’s mother. The laws in the Pentateuch sometimes assume the possibility that a man may have more than one wife (cf., e.g., Deut 21:15-17).