1 Chronicles 10:13

13 Saul died because he was not faithful to the Lord and did not obey the Lord. He even went to a medium and asked her for advice

1 Chronicles 10:13 Meaning and Commentary

1 Chronicles 10:13

So Saul died for his transgression
(See Gill on 1 Samuel 31:13) A violent and dishonourable death, which was suffered on account of the sins he was guilty of:

one was, which he committed against the Lord, even against the word of
the Lord, which he kept not;
both in not staying for Samuel the time appointed, and by sparing the Amalekites whom he was bid to destroy, ( 1 Samuel 13:13 1 Samuel 13:14 ) ( 1 Samuel 15:3 1 Samuel 15:9 )

and also for asking counsel of one that had a familiar spirit, to
inquire of it;
what he should do with respect to engaging in battle with the Philistines, ( 1 Samuel 28:8 1 Samuel 28:15 ) which to do was contrary to an express command of God, ( Leviticus 19:31 ) .

1 Chronicles 10:13 In-Context

11 All the people in Jabesh Gilead heard what the Philistines had done to Saul.

12 So the brave men of Jabesh went and got the bodies of Saul and his sons and brought them to Jabesh. They buried their bones under the large tree in Jabesh. Then the people of Jabesh gave up eating for seven days.

13 Saul died because he was not faithful to the Lord and did not obey the Lord. He even went to a medium and asked her for advice

14 instead of asking the Lord. This is why the Lord put Saul to death and gave the kingdom to Jesse's son David.