Deuteronomy 27:20

³⁰A man shall not take his father’s wife, and shall not uncover his father’s skirt.

⁸“‘You shall not uncover the nakedness of your father’s wife. It is your father’s nakedness.

¹It is actually reported that there is sexual immorality among you, and such sexual immorality as is not even named among the Gentiles, that one has his father’s wife.

¹¹“‘The man who lies with his father’s wife has uncovered his father’s nakedness. Both of them shall surely be put to death. Their blood shall be upon themselves.

²²While Israel lived in that land, Reuben went and lay with Bilhah, his father’s concubine, and Israel heard of it. Now the sons of Jacob were twelve.

¹The sons of Reuben the firstborn of Israel (for he was the firstborn, but because he defiled his father’s couch, his birthright was given to the sons of Joseph the son of Israel; and the genealogy is not to be listed according to the birthright.

⁷They trample the heads of the poor into the dust of the earth and deny justice to the oppressed. A man and his father use the same maiden, to profane my holy name.

⁴Boiling over like water, you shall not excel, because you went up to your father’s bed, then defiled it. He went up to my couch.

¹⁰In you have they uncovered their fathers’ nakedness. In you have they humbled her who was unclean in her impurity.

²²So they spread a tent for Absalom on the top of the house, and Absalom went in to his father’s concubines in the sight of all Israel.