1 Samuel 15:7-9

7Then Saul struck down the Amalekites all the way from Havilah to Shur, which is east of Egypt. 8He captured Agag king of Amalek alive, but devoted all the others to destruction with the sword.

9Saul and his troops spared Agag, along with the best of the sheep and cattle, the fat calves1 and lambs, and the best of everything else. They were unwilling to devote them to destruction, but they devoted to destruction all that was despised and worthless.