1 Samuel 14:48
And whithersoever he turned himself, there he won, and played the man and slew the Amalekites, and rid Israel out of the hands of them that spoiled them.
Exodus 17:14
And the LORD said unto Moses, "Write this for a remembrance in a book and tell it unto Joshua, for I will put out the remembrance of Amalek from under heaven."
Deuteronomy 25:19
Therefore 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 to inherit and possess: see that thou put out the name of Amalek from under heaven, and forget not.
1 Samuel 15:3-7
Now therefore go and smite the Amalekites, and only destroy ye all that pertaineth unto them, and see thou have no compassion on them. But slay both man and woman, infant and suckling, and ox, sheep, camel and ass.'"