1 Samuel 15:8-9

He captured Agag the king of the Amalekites alive, though he totally destroyed all [the rest of] the people with the sword. Saul and the people spared Agag and the best of the sheep, the oxen, the fatlings, the lambs, and everything that was good, and they were not willing to destroy them entirely; but everything that was undesirable or worthless they destroyed completely.