1 Samuel 15:7-9

7Then Saul struck down the Amalekites from Havilah until you come to Shur, which is close to Egypt.

8He captured King Agag of Amalek alive, and utterly destroyed all the people with the edge of the sword.

9But Saul and the people spared Agag as well as the best of the sheep, the cattle, even the fatlings and the lambs, and all that was good, since they were not willing to utterly destroy them; everything that was worthless and feeble, they destroyed completely.