If a man commits adultery with another man’s wife—with the wife of his neighbor—both the adulterer and the adulteress must surely be put to death.
Jewish Publication Society of America Version (JPS1917) - Leviticus 20:10 >And the man that committeth adultery with another man's wife, even he that committeth adultery with his neighbour's wife, both the adulterer and the adulteress shall surely be put to death.