Genesis

Then came Amalek, and fought with Israel in Rephidim.

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.

For he said, Because the Lord hath sworn that the Lord will have war with Amalek from generation to generation.

And Edom shall be a possession, Seir also shall be a possession for his enemies; and Israel shall do valiantly.