Exodus

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

Remember what Amalek did unto thee by the way, when ye were come forth out of Egypt;

Therefore it shall be, when the Lord thy God hath given thee rest from all thine enemies round about, in the land which the Lord thy God giveth thee for an inheritance to possess it, that thou shalt blot out the remembrance of Amalek from under heaven; thou shalt not forget it.

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;