1 Samuel 15:2-3

2Thus says Adonai-Tzva’ot: ‘I remember what Amalek did to Israel, how he set himself against him on the way while he was coming up from Egypt.

3Now go and strike down Amalek and put all he has under the ban of destruction—so have no pity on him; but kill both men and women, children and nursing infants, oxen and sheep, camels and donkeys.’”