וְלָ֥מָּה לֹא־שָׁמַ֖עְתָּ בְּק֣וֹל יְהוָ֑ה וַתַּ֙עַט֙ אֶל־הַשָּׁלָ֔ל וַתַּ֥עַשׂ הָרַ֖ע בְּעֵינֵ֥י יְהוָֽה׃ (ס)
Wherefore then didst thou not hearken to the voice of the LORD, but didst fly upon the spoil, and didst that which was evil in the sight of the LORD?’
Read kabbalistic (mystical) interpretation of I Samuel 15:19: and classical mystical sources.