וַיֹּ֣אמֶר שְׁמוּאֵ֔ל כַּאֲשֶׁ֨ר שִׁכְּלָ֤ה נָשִׁים֙ חַרְבֶּ֔ךָ כֵּן־תִּשְׁכַּ֥ל מִנָּשִׁ֖ים אִמֶּ֑ךָ וַיְשַׁסֵּ֨ף שְׁמוּאֵ֧ל אֶת־אֲגָ֛ג לִפְנֵ֥י יְהוָ֖ה בַּגִּלְגָּֽל׃ (ס)
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.
Read halakhic rulings (Jewish law) on I Samuel 15:33: and classical halakhic sources.