King Shaul’s error[1]
ויבא שמואל אל-שאול ויאמר לו שאול ברוך אתה ליקוק הקימתי את-דבר יקוק: ויאמר שמואל ומה קול-הצאן הזה באזני וקול הבקר אשר אנכי שמע וגו’ הלוא אם-קטן אתה בעיניך ראש שבטי ישראל אתה וגו’
Shmuel came to Shaul, and Shaul said to him: “You are blessed to Hashem! I have fulfilled the word of Hashem”. Shmuel said: “Then what is this sound of the sheep that is in my ears? And the sound of the cattle which I hear? … You may be small in your eyes, but you are the head of the tribes of Israel!…[2]
The haftarah for parshas Zachor details the failure of King Shaul to eradicate the wicked nation of Amalek. Shmuel the prophet ordered Shaul to leave no person or animal alive, as Hashem told Moshe[3] that we are to blot out the memory of Amalek. Shaul however left alive the king of Amalek known as Agag, the ancestor to Haman[4]. He also left alive their sheep and cows, intending to bring them as offerings for Hashem. Shmuel harshly reprimanded Shaul for his failure, and Shaul lost the kingship as a result of his sin.