Exodus 17:8

Amalek] The Amalekites, here described collectively in the singular number, were a nomadic tribe, very fierce and warlike, roaming over the desert country S. of Canaan, including the Sinaitic peninsula where the Israelites first encountered them. They probably regarded the Israelites as their rivals for supremacy. They gave them much trouble, not only at various times during the desert wanderings (see e.g. Numbers 13:29; Numbers 14:25; Numbers 14:43), but down to a late period of their history: see Judges 6:3; 1 Samuel 15:1; 1 Samuel 30; 1 Samuel 30; 1 Chronicles 4:43.