2 Samuel 17:25

And Abessalom appointed Amessai in the room of Joab over the host. And Amessai was the son of a man whose name was Jether of Jezrael: he went in to Abigaia the daughter of Naas, the sister of Saruia the mother of Joab.

And Absalom made Amasa captain of the host instead of Joab: which Amasa was a man’s son, whose name was Ithra an Israelite, that went in to Abigail the daughter of Nahash, sister to Zeruiah Joab’s mother.

Absalom set Amasa over the army instead of Joab. Now Amasa was the son of a man whose name was Ithra the Israelite, who went in to Abigail the daughter of Nahash, sister to Zeruiah, Joab’s mother.