ni-KHAM-tee kee him-LAKH-tee et sha-UL l’-ME-lekh kee SHAV may-a-kha-RAI v’-et d’-va-RAI lo hay-KEEM va-YI-khar lish-mu-AYL va-yiz-AK el a-do-NAI kol ha-LAI-la
15:11 I regret that I made Shaul king
Shaul’s error of not completely eradicating the evil Amalek costs him his kingdom. Yet, King David’s sin with Batsheva (II Samuel 11-12) does not have a similar result. In his Book of the Principles, Rabbi Yosef Albo, a philosopher in fifteenth century Spain, notes that King David’s sin, though grave, is a personal one. Therefore, his punishment only impacts him and his family. However, King Shaul’s transgression was of a national scope, impacting the future of the nation. In fact, the Rabbis of the Midrash teach that the evil Haman mentioned in Megillat Esther descends from Amalek’s King Agag, whom Shaul kept alive long enough to father a child. Thus, the punishment has to be one that impacts his rule over the whole nation.