20 Heb “And a man who.” The syntax here and at the beginning of the following verses elliptically mirrors that of v. 9, which justifies the rendering as a conditional clause.
21 The reading of the minuscule has been followed here (see the footnote a-a). The has a dittography, repeating “a man who commits adultery with the wife of” (see the explanation in J. E. Hartley, Leviticus [], ). The duplication found in the is reflected in some English versions, e.g., , , , .

In other versions

ESVEnglish Standard Version

“If a man commits adultery with the wife of his neighbor, both the adulterer and the adulteress shall surely be put to death.

NIVNew International Version (2011)

“ ‘If a man commits adultery with another man’s wife—with the wife of his neighbor—both the adulterer and the adulteress are to be put to death.

CSBChristian Standard Bible

“If a man commits adultery with a married woman—if he commits adultery with his neighbor’s wife—both the adulterer and the adulteress must be put to death.

NLTNew Living Translation

“If a man commits adultery with his neighbor’s wife, both the man and the woman who have committed adultery must be put to death.

“ ‘As for a man who commits adultery with a man’s wife, who commits adultery with his neighbor’s wife, both the man who commits adultery and the woman who commits adultery shall surely be put to death.

KJV 1900King James Version

And the man that committeth adultery with another man’s wife, even he that committeth adultery with his neighbour’s wife, the adulterer and the adulteress shall surely be put to death.

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Leviticus 20:10

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Footnotes