2 Samuel 17:25

Absalom had appointed Amasa in place of Joab over the army. Now Amasa [was] the son of a man whose name [was] Ithra the Israelite, {who had married} Abigail the daughter of Nahash the sister of Zeruiah, the mother of Joab.

2 Samuel 19:13

To Amasa you shall say: '[Are] you not my bones and my flesh? {May God punish me} if you [are] not the commander of my army before me forever, in place of Joab.'"

2 Samuel 20:9-12

Then Joab said to Amasa, "Is it peace, O you my brother?" Then the right hand of Joab took hold of the beard of Amasa [as if] to kiss him.

1 Chronicles 2:13

And Jesse fathered Eliab his firstborn, Abinadab the second, Shimea the third,

2 Samuel 20:4

Then the king said to Amasa, "Summon for me the men of Judah [within] three days, {and be here yourself}."

1 Kings 2:5

"Moreover, you also know what Joab the son of Zeruiah did to me when he dealt with the two commanders of the armies of Israel, to Abner son of Ner and to Amasa son of Jether, and he murdered them and put the blood of war in [a time of] peace. He put the blood of war on the leather belt that was on his waist and on the sandals which were on his feet.

1 Kings 2:32

Yahweh will return his blood on his head, because he fell upon two men, more righteous and better than he, and he killed them with the sword, even though my father did not know it; [namely] Abner son of Ner, commander of the army of Israel, and Amasa son of Jether, commander of the army of Judah.

1 Chronicles 2:16-17

And their sisters [were] Zeruiah and Abigail. The sons of Zeruiah: Abishai, Joab, and Asahel, three.

Treasury of Scripture Knowledge

Summary

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.

General references

Bible References

Nahash

1 Chronicles 2:13
And Jesse fathered Eliab his firstborn, Abinadab the second, Shimea the third,

General references

2 Samuel 20:12
Now Amasa [was] wallowing in the blood in the middle of the highway; when the man saw that all the people stood [there], he turned Amasa over from the highway into the field, and he threw a garment over him because he had seen that all who had come by him had stopped.