Samuel delivered God's command to Saul without ambiguity: destroy the Amalekites completely. Every man, woman, child, and animal—total annihilation as divine punishment for what Amalek had done to Israel during the Exodus. Saul assembled four hundred thousand soldiers plus thirty thousand from the tribe of Judah, set ambushes along the rivers, and crushed the Amalekite army. He burned their cities. He killed the women and children, as ordered.
But he kept one thing alive: Agag, the Amalekite king, whose beauty and stature impressed him. The soldiers, too, kept the best livestock for themselves. Everything worthless they destroyed. Everything valuable they spared. It was selective obedience—which is to say, disobedience.
God told Samuel he regretted making Saul king. Samuel prayed all night for reconciliation. God refused. When Samuel arrived at Gilgal the next morning, Saul ran to embrace him, declaring he had fulfilled every command. Samuel's reply was devastating: "Then why do I hear sheep bleating and cattle lowing?" Saul blamed the people. Samuel cut him off with words that would echo through all of Israelite theology: God does not delight in sacrifices but in obedience. To obey is better than any burnt offering. Your kingdom will be torn from you and given to a better man.
As Samuel turned to leave, Saul grabbed his cloak so desperately that it ripped—and Samuel said the kingdom would be ripped from him in exactly the same way. Then Samuel had Agag brought before him. The Amalekite king asked, trembling, "Surely the bitterness of death has passed?" Samuel answered: "As your sword made mothers childless, so shall your mother be childless." He executed Agag at Gilgal and never saw Saul again.
God then sent Samuel to Bethlehem, to the house of Jesse. Seven sons paraded before the prophet—tall, handsome, impressive. God rejected every one. "Man looks at outward appearance," God said, "but I look at the heart." The youngest, David, a ruddy-faced shepherd boy, was called in from the fields. Samuel anointed him in secret. The divine spirit left Saul that very day and settled on David, who began to prophesy. And a darkness—strange, demonic, suffocating—descended on the rejected king, who could find relief only when a young harpist from Bethlehem played music in his chambers.