1 Chronicles 10:13

13 And Saul dieth because of his trespass that he trespassed against Jehovah, against the word of Jehovah that he kept not, and also for asking at a familiar spirit -- to inquire, --

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 And all Jabesh-Gilead hear of all that the Philistines have done to Saul,
12 and all the men of valour rise and bear away the body of Saul, and the bodies of his sons, and bring them in to Jabesh, and bury their bones under the oak in Jabesh, and fast seven days.
13 And Saul dieth because of his trespass that he trespassed against Jehovah, against the word of Jehovah that he kept not, and also for asking at a familiar spirit -- to inquire, --
14 and he inquired not at Jehovah, and He putteth him to death, and turneth round the kingdom to David son of Jesse.
Young's Literal Translation is in the public domain.