Saul said to Samuel, I have sinned; for I have transgressed the commandment of Yahweh, and your words, because I feared the people, and obeyed their voice.
Most scholars are sure Saul attacked the Amalekites who lived in the southern Judah Negev, though some feel he attacked an enclave of them in western Samaria. [Note: E.g., Diane Edelmann, "Saul’s Battle Against Amaleq (1 Samuel 15)," Journal for the Study of the Old Testament 35 (June 1986):74-81.] Saul did not destroy all the Amalekites at this time (1 Samuel 27:8; 1 Samuel 30:1; 2 Samuel 8:12). King Hezekiah completely annihilated them years later (1 Chronicles 4:43).