1 Chronicles 2:17

And, Abigail, bare Amasa, - and, the father of Amasa, was Jether the Ishmaelite.

2 Samuel 17:25

Now Absolom had appointed, Amasa, instead of Joab, over the army, - Amasa, being the son of a man whose name was Ithra the Ishmaelite, who went in unto Abigail, daughter of Nahash, sister of Zeruiah, mother of Joab.

2 Samuel 19:13

And, unto Amasa, shall ye say, Art not, thou, my bone and my flesh? So, let God do to me, and, so, let him add, if thou become not, prince of the army, before me continually, instead of Joab.

2 Samuel 20:4-12

Then said the king unto Amasa, Assemble me the men of Judah, within three days, - and, thou, here, take thy stand!

1 Kings 2:5

Moreover also, thou, knowest what Joab son of Zeruiah did to me, how he dealt with two generals of the armies of Israel - with Abner son of Ner, and with Amasa son of Jether - both of whom he slew, shedding the blood of war in peace, - and putting the blood of war upon his girdle that was on his loins, and upon his sandals, that were on his feet.

1 Kings 2:32

thus will Yahweh bring back his blood upon his own head, in that he fell upon two men more righteous and better than he, and slew them with the sword, my father David not knowing it, - even Abner son of Ner, general of the army of Israel, and Amasa son of Jether, general of the army of Judah;

Treasury of Scripture Knowledge

Summary

And Abigail bare Amasa: and the father of Amasa was Jether the Ishmeelite.

Bible References

Amasa

2 Samuel 17:25
Now Absolom had appointed, Amasa, instead of Joab, over the army, - Amasa, being the son of a man whose name was Ithra the Ishmaelite, who went in unto Abigail, daughter of Nahash, sister of Zeruiah, mother of Joab.
2 Samuel 19:13
And, unto Amasa, shall ye say, Art not, thou, my bone and my flesh? So, let God do to me, and, so, let him add, if thou become not, prince of the army, before me continually, instead of Joab.
2 Samuel 20:4
Then said the king unto Amasa, Assemble me the men of Judah, within three days, - and, thou, here, take thy stand!
1 Kings 2:5
Moreover also, thou, knowest what Joab son of Zeruiah did to me, how he dealt with two generals of the armies of Israel - with Abner son of Ner, and with Amasa son of Jether - both of whom he slew, shedding the blood of war in peace, - and putting the blood of war upon his girdle that was on his loins, and upon his sandals, that were on his feet.