25 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.
2 Samuel 17:25 Cross References - WEB
2 Samuel 19:13
13 Say to Amasa, ‘Aren’t you my bone and my flesh? God do so to me, and more also, if you aren’t captain of the army before me continually instead of Joab.’”
2 Samuel 20:4
4 Then the king said to Amasa, “Call me the men of Judah together within three days, and be here present.”
2 Samuel 20:9-12
9 Joab said to Amasa, “Is it well with you, my brother?” Joab took Amasa by the beard with his right hand to kiss him.
10 But Amasa took no heed to the sword that was in Joab’s hand. So he struck him with it in the body, and shed out his bowels to the ground, and didn’t strike him again; and he died. Joab and Abishai his brother pursued Sheba the son of Bichri.
11 One of Joab’s young men stood by him, and said, “He who favors Joab, and he who is for David, let him follow Joab!”
12 Amasa lay wallowing in his blood in the middle of the highway. When the man saw that all the people stood still, he carried Amasa out of the highway into the field, and cast a garment over him, when he saw that everyone who came by him stood still.
1 Kings 2:5
5 “Moreover you know also what Joab the son of Zeruiah did to me, even what he did to the two captains of the armies of Israel, to Abner the son of Ner, and to Amasa the son of Jether, whom he killed, and shed the blood of war in peace, and put the blood of war on his sash that was around his waist, and in his sandals that were on his feet.
1 Kings 2:32
32 Yahweh will return his blood on his own head, because he fell on two men more righteous and better than he, and killed them with the sword, and my father David didn’t know it: Abner the son of Ner, captain of the army of Israel, and Amasa the son of Jether, captain of the army of Judah.
1 Chronicles 2:13
13 and Jesse became the father of his firstborn Eliab, and Abinadab the second, and Shimea the third,