1st Samuel 15:34

29 Also the Strength of Israel will not lie nor repent; for he is not a man, that he should repent.

30 Then he said, I have sinned: yet honor me now, Please, before the elders of my people, and before Israel, and turn again with me, that I may worship Yahweh your God.

31 So Samuel turned again after Saul; and Saul worshipped Yahweh.

32 Then said Samuel, Bring you here to me Agag the king of the Amalekites. Agag came to him cheerfully. Agag said, Surely the bitterness of death is past.

33 Samuel said, As your sword has made women childless, so shall your mother be childless among women. Samuel hewed Agag in pieces before Yahweh in Gilgal.

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

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