Exodus 17:8

And Timna was concubine to Eliphaz Esau’s son; and she bare to Eliphaz Amalek: these were the sons of Adah Esau’s wife.

And it came to pass, when David and his men were come to Ziklag on the third day, that the Amalekites had invaded the south, and Ziklag, and smitten Ziklag, and burned it with fire;

Thus saith the LORD of hosts, I remember that which Amalek did to Israel, how he laid wait for him in the way, when he came up from Egypt.

And when he looked on Amalek, he took up his parable, and said, Amalek was the first of the nations; but his latter end shall be that he perish for ever.

Gebal, and Ammon, and Amalek; the Philistines with the inhabitants of Tyre;

Duke Korah, duke Gatam, and duke Amalek: these are the dukes that came of Eliphaz in the land of Edom; these were the sons of Adah.