1 Samuel 15:32-33

32Then Samuel said, ‘Bring Agag, king of the Amalekites, to me.’ Agag came to Samuel. Agag was happy because he thought, ‘I am sure that now I will not have to die a painful death.’

33But Samuel said to Agag, ‘You have used your sword to kill the children of many mothers. Now your own mother will have no children that are still alive.’ Then Samuel cut Agag into pieces at the Lord's altar in Gilgal.