Fratricide: Solomon
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1 Kings 2:23–25
Then King Solomon swore by the LORD: “May God punish me, and ever so severely, if Adonijah has not made this request at the expense of his life. / And now, as surely as the LORD lives—the One who established me, who set me on the throne of my father David, and who founded for me a dynasty as He promised—surely Adonijah shall be put to death today!” / So King Solomon sent the order to Benaiah son of Jehoiada, who struck down Adonijah, and he died.