1 Samuel 28:18

Because thou obeyedst not the voice of the Lord
At Gilgal, as Abarbinel thinks; which is the first thing for which the kingdom was threatened to be taken from him, ( 1 Samuel 13:13 1 Samuel 13:14 ) ;

nor executedst his fierce wrath upon Amalek:
in sparing Agag, and the best of the cattle, ( 1 Samuel 15:9 1 Samuel 15:28 ) ;

therefore hath the Lord done this thing unto thee this day;
forsaken him, rent his kingdom from him, and would deliver him into the hands of the Philistines, as follows: had he been the true Samuel, he would have told him of some other sins of his, provoking to the Lord; as his slaughter of the priests at Nob, his cruel persecution of David, and especially of his asking counsel of one that had a familiar spirit at this time, of which not a word is said, and yet was the very transgression for which Saul died, ( 1 Chronicles 10:13 1 Chronicles 10:14 ) .