Saul disobeyed God by sparing the life of Agag, the King of the

Saul disobeyed God by sparing the life of Agag, the King of the Amalekites. According to the Old Testament book of 1 Samuel, God had ordered Saul and his army to completely destroy the Amalekites and all their possessions, including their king. However, Saul did not fully obey God's command and spared the life of King Agag and some of the spoils of war. As a result, God rejected Saul as king and chose David to succeed him.