13
So Saul died for his unfaithfulness which he had committed against the Lord, because he did not keep the word of the Lord, and also because he consulted a medium for guidance.
14
But he did not inquire of the Lord; therefore He killed him, and turned the kingdom over to David the son of Jesse.
This part, 1Ch 10:1-12 which gives an account of the last battle of Saul with the Philistines, and of his death and burial, is the same with 1Sa 31:1-13 see the notes there; the cause of his death follows in 1Ch 10:13.