1 Samuel 15:31-35

So Samuel turned again after Saul; and Saul worshipped the LORD.

Then said Samuel, Bring ye hither to me Agag the king of the Amalekites. And Agag came unto him delicately. And Agag said, Surely the bitterness of death is past.

And Samuel said, As thy sword hath made women childless, so shall thy mother be childless among women. And Samuel hewed Agag in pieces before the LORD in Gilgal.

Then Samuel went to Ramah; and Saul went up to his house to Gibeah of Saul.

And Samuel came no more to see Saul until the day of his death: nevertheless Samuel mourned for Saul: and the LORD repented that he had made Saul king over Israel.