2 Samuel 17:25

and Amasa hath Absalom set instead of Joab over the host, and Amasa is a man's son whose name is Ithra the Israelite who hath gone in unto Abigail, daughter of Nahash, sister of Zeruiah, mother of Joab;

2 Samuel 19:13

And to Amasa say ye, Art not thou my bone and my flesh? Thus doth God do to me, and thus He doth add, if thou art not head of the host before me all the days instead of Joab.'

2 Samuel 20:9-12

And Joab saith to Amasa, 'Art thou in peace, my brother?' and the right hand of Joab layeth hold on the beard of Amasa to give a kiss to him;

1 Chronicles 2:13

and Jesse begat his first-born Eliab, and Abinadab the second, and Shimea the third,

2 Samuel 20:4

And the king saith unto Amasa, 'Call for me the men of Judah in three days, and thou, stand here,'

1 Kings 2:5

And also, thou hast known that which he did to me -- Joab son of Zeruiah -- that which he did to two heads of the hosts of Israel, to Abner son of Ner, and to Amasa son of Jether -- that he slayeth them, and maketh the blood of war in peace, and putteth the blood of war in his girdle, that is on his loins, and in his sandals that are on his feet;

1 Kings 2:32

and Jehovah hath turned back his blood on his own head, who hath fallen on two men more righteous and better than he, and slayeth them with the sword, -- and my father David knew not -- Abner son of Ner, head of the host of Israel, and Amasa son of Jether, head of the host of Judah;

1 Chronicles 2:16-17

and their sisters Zeruiah and Abigail. And sons of Zeruiah: Abishai, and Joab, and Asah-El -- 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 begat his first-born Eliab, and Abinadab the second, and Shimea the third,

General references

2 Samuel 20:12
And Amasa is rolling himself in blood, in the midst of the highway, and the man seeth that all the people have stood still, and he bringeth round Amasa out of the highway to the field, and casteth over him a garment, when he hath seen that every one who hath come by him -- hath stood still.