1 Samuel 15:30-35
English Standard Version
Chapter 15
30Then he said, "I have sinned; yet honor me now before the elders of my people and before Israel, and return with me, that I may bow before the Lord your God." 31So Samuel turned back after Saul, and Saul bowed before the Lord.
32Then Samuel said, "Bring here to me Agag the king of the Amalekites." And Agag came to him cheerfully. Agag said, "Surely the bitterness of death is past."
33And Samuel said, "As your sword has made women childless, so shall your mother be childless among women." And Samuel hacked Agag to pieces before the Lord in Gilgal.