1 Samuel 15:3-7

15:3 So go now and strike down the Amalekites. Destroy everything that they have. Don’t spare them. Put them to death – man, woman, child, infant, ox, sheep, camel, and donkey alike.’”

15:4 So Saul assembled the army and mustered them at Telaim. There were 200,000 foot soldiers and 10,000 men of Judah. 15:5 Saul proceeded to the city of Amalek, where he set an ambush in the wadi. 15:6 Saul said to the Kenites, “Go on and leave! Go down from among the Amalekites! Otherwise I will sweep you away with them! After all, you were kind to all the Israelites when they came up from Egypt.” So the Kenites withdrew from among the Amalekites.

15:7 Then Saul struck down the Amalekites all the way from Havilah to Shur, which is next to Egypt.

Exodus 17:14

17:14 The Lord said to Moses, “Write this as a memorial in the book, and rehearse it in Joshua’s hearing; for I will surely wipe out the remembrance of Amalek from under heaven.

Deuteronomy 25:19

25:19 So when the Lord your God gives you relief from all the enemies who surround you in the land he is giving you as an inheritance, you must wipe out the memory of the Amalekites from under heaven – do not forget!