פירוש על דברי הימים א 10:13

And Saul died because of the treachery that he had committed He committed two treacherous acts by inquiring of the familiar spirit: one when he inquired after Samuel, and one when he inquired of familiar spirits, and in the Aggadah of Samuel (24:6) we learn that he committed five treacherous acts

concerning the word of the Lord that he did not keep that which Samuel had commanded him, as it is written (I Sam. 10:8): “Seven days shall you wait,” and because he dealt treacherously in the war of Amalek [by sparing Agag].