1 Samuel 14:48
He acted bravely and defeated [the] Amalekites and rescued Israel from the hand of those who plundered it.
Exodus 17:14
And Yahweh said to Moses, "Write this [as] a memorial in the scroll and {recite it in the hearing of} Joshua, because I will utterly blot out the remembrance of Amalek from under the heavens."
Deuteronomy 25:19
{And when} Yahweh your God gives rest to you from all your enemies from around [about you] in the land that Yahweh your God [is] giving to you [as an] inheritance to take possession of it, you shall blot out the remembrance of Amalek from under the heavens; you shall not forget!"
1 Samuel 15:3-7
So then, go and attack Amalek and utterly destroy all that is his! You must not spare him, but kill both man and woman, both child and nursing infant, both ox and sheep, both camel and donkey.'"