"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."- 1 Samuel 15:33.
Was Agag's mother alive when Samuel said this or not? Or was she one of the many people who were killed by "the edge of the sword" a couple of verses earlier? Did the king as an individual usually represent his immediate family?
Or is it something more symbolic? Like condemning Agag and his spawn to a fate of nothingness, where upon death, no-one would be able to revive any trace of their legacies or even any of their memories? The Amalekites seemed to be quite a fierce yet deeply enigmatic enemy for the Israelites.