Incest: Isaac with Rebekah
Source: Nav
Genesis 24:15, 67
Before the servant had finished praying, Rebekah came out with her jar on her shoulder. She was the daughter of Bethuel son of Milcah, the wife of Abraham’s brother Nahor. / And Isaac brought her into the tent of his mother Sarah and took Rebekah as his wife. And Isaac loved her and was comforted after his mother’s death.