Saul and his troops spared Agag, along with the best of the sheep and cattle, the fat calves 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.
KJV
But Saul and the people spared Agag, and the best of the sheep, and of the oxen, and of the fatlings, and the lambs, and all [that was] good, and would not utterly destroy them: but every thing [that was] vile and refuse, that they destroyed utterly.
ASV
But Saul and the people spared Agag, and the best of the sheep, and of the oxen, and of the fatlings, and the lambs, and all that was good, and would not utterly destroy them: but everything that was vile and refuse, that they destroyed utterly.