Berean Standard Bible
2 Samuel 17:25
“Absalom had appointed Amasa over the army in place of Joab. Amasa was the son of a man named Ithra, the Ishmaelite who had married Abigail, the daughter of Nahash and sister of Zeruiah the mother of Joab.”

In context
24Then David went to Mahanaim, and Absalom crossed the Jordan with all the men of Israel.
25Absalom had appointed Amasa over the army in place of Joab. Amasa was the son of a man named Ithra, the Ishmaelite who had married Abigail, the daughter of Nahash and sister of Zeruiah the mother of Joab.
26So the Israelites and Absalom camped in the land of Gilead.
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Berean Standard Bible · A modern, readable English translation. Public domain (CC0).