What does 1 Samuel 15:8 mean?
Saul once again (1 Samuel 13:8–14) directly disobeys the command of the Lord God of Israel. Through the prophet Samuel, the Lord had given Saul explicit instructions. He was to "devote to destruction all that [the Amalekites] have. Do not spare them, but kill both man and woman, child and infant, ox and sheep, camel and donkey" (1 Samuel 15:3). Saul and his army execute nearly all the Amalekite people (1 Samuel 30:1; 1 Chronicles 4:43), but Saul spares the life of Agag the king (1 Samuel 15:9). The Israelites also keep the best of the livestock.It's unknown why Saul thought it was permissible to spare the king. Commentators speculate that perhaps it was a custom for kings to preserve other kings when defeating them in battle. The name, Agag, may have been a title in the same way that "Pharaoh" was a title for the king among the Egyptians.