1 Samuel 15:5 in the World English Bible
Saul came to the city of Amalek, and set an ambush in the valley.
Context
4 And Saul gathered the people together, and numbered them in Telaim, two hundred thousand footmen, and ten thousand men of Judah.
5 And Saul came to a city of Amalek, and laid wait in the valley.
6 And Saul said unto the Kenites, Go, depart, get you down from among the Amalekites, lest I destroy you with them: for ye shewed kindness to all the children of Israel, when they came up out of Egypt. So the Kenites departed from among the Amalekites.