1 Samuel 15:2-3 WEB

2 Thus says Yahweh of Hosts, I have marked that which Amalek did to Israel, how he set himself against him in the way, when he came up out of Egypt.
3 Now go and strike Amalek, and utterly destroy all that they have, and don't spare them; but kill both man and woman, infant and suckling, ox and sheep, camel and donkey.