2 Samuel 17:25

And Absalom made Amasa captain of the army instead of Joab. This Amasa was the son of a man whose name was Jithra, an Israelite, who had gone in to Abigail the daughter of Nahash, sister of Zeruiah, Joab's mother.

Surrounding context

17:24 Then David went to Mahanaim. And Absalom crossed over the Jordan, he and all the men of Israel with him.

17:25 And Absalom made Amasa captain of the army instead of Joab. This Amasa was the son of a man whose name was Jithra, an Israelite, who had gone in to Abigail the daughter of Nahash, sister of Zeruiah, Joab's mother.

17:26 So Israel and Absalom encamped in the land of Gilead.

Translation and sources