Deuteronomy 27:20 teaches that sexual relations with a father’s wife are a serious wrong that brings a curse on the person who does it. The verse is a formal declaration within a covenant ceremony, spoken by the Levites to all Israel, which the people then confirm together.
‘Cursed is he who lies with his father’s wife, because he dishonors his father’s bed.’ All the people shall say, ‘Amen.’
Deuteronomy 27:20 (WEB)
What Deuteronomy 27:20 Means
The verse begins with the word “cursed,” which in this setting means a person placed under God’s judgment and outside the protection of the covenant community. The curse is not a casual insult. It is the public pronouncement that a particular act breaks the relationship between Israel and the Lord, who guards the family as a place of trust and order.
The phrase “lies with his father’s wife” describes a sexual act that crosses a boundary the family structure depends on. The reason the text gives is that such a man “dishonors his father’s bed.” The bed stands for the marriage and household of the father, which is meant to be secure and respected. Violating it is an attack on the father’s dignity and on the family line itself.
The verse does not describe the consequences in detail or promise any particular punishment in this life. It names the wrong, states God’s verdict, and calls the community to affirm that verdict aloud. Its purpose is to teach what is holy and what is forbidden, not to predict a specific outcome for any individual.
The Context of Deuteronomy 27:20
Deuteronomy is presented as the words Moses spoke to Israel on the plains of Moab before they entered the Promised Land. Traditionally Moses is named as its author, and the audience is the new generation that had grown up in the wilderness. Chapter 27 records an instruction to set up stones, write the law on them, and proclaim blessings and curses from the twin mountains Gerizim and Ebal once Israel crossed the Jordan.
Verse 20 is one item in a list of twelve curses that run from verse 15 onward. Each curse follows the same pattern: a declaration, then the response “Amen.” The list moves from hidden wrongs against a neighbor, such as moving a boundary stone, to wrongs against the vulnerable, such as leading the blind astray or denying justice to the foreigner, fatherless, and widow. Verses 20 through 23 then turn to sexual offenses within the family and with animals. Seen in that sequence, the verse is one part of a broad call to a life of justice and purity before God.
Key Phrases in Deuteronomy 27:20
Exodus 20:12
“Honor your father and your mother, that your days may be long in the land which the LORD your God gives you.
(WEB)
This commandment to honor one’s father and mother stands behind the concern in Deuteronomy 27:20. Reading the two together shows that respect for parents is a foundation of the covenant, and that dishonoring a father’s household breaks a command God gave directly.
Leviticus 18:8
“‘You shall not uncover the nakedness of your father’s wife. It is your father’s nakedness.
(WEB)
Leviticus lists forbidden sexual relationships within the family and gives the same prohibition in fuller detail. Reading it alongside Deuteronomy 27:20 helps clarify that the curse pronounced in Deuteronomy rests on a law the people already knew and were called to keep.
A Short Prayer From Deuteronomy 27:20
Lord, you guard the families you have made and you call us to live with purity and honor. Where I have treated the people closest to me carelessly, or let desire pull me toward what would wound them, I ask you to forgive me. Give me clear eyes to see the boundaries you have set and a steady heart to keep them. Help me honor the people you have placed in my life, and bring me back quickly whenever I stray. Amen.
