So Saul died for his unfaithfulness to the LORD, because he did not keep the word of the LORD and even consulted a medium for guidance,

Acts 16:16
One day as we were going to the place of prayer, we were met by a slave girl with a spirit of divination, who earned a large income for her masters by fortune-telling.

Leviticus 19:31
You must not turn to mediums or spiritists; do not seek them out, or you will be defiled by them. I am the LORD your God.

Leviticus 20:6
Whoever turns to mediums or spiritists to prostitute himself with them, I will also set My face against that person and cut him off from his people.

1 Samuel 13:13
"You have acted foolishly," Samuel declared. "You have not kept the command that the LORD your God gave you; if you had, the LORD would have established your kingdom over Israel for all time.

1 Samuel 13:14
But now your kingdom will not endure; the LORD has sought a man after His own heart and appointed him ruler over His people, because you have not kept the command of the LORD."

1 Samuel 15:23
For rebellion is like the sin of divination, and arrogance is like the wickedness of idolatry. Because you have rejected the word of the LORD, He has rejected you as king."

1 Samuel 28:6
He inquired of the LORD, but the LORD did not answer him by dreams or Urim or prophets.

1 Samuel 28:7
Then Saul said to his servants, "Find me a woman who is a medium, so I can go and consult her." "There is a medium at Endor," his servants replied.

1 Samuel 28:8
So Saul disguised himself by putting on different clothes, and he set out with two of his men. They came to the woman at night, and Saul said, "Consult a spirit for me. Bring up for me the one I name."

Isaiah 19:3
Then the spirit of the Egyptians will be emptied out from among them, and I will frustrate their plans, so that they will resort to idols and spirits of the dead, to mediums and spiritists.

So Saul died for his transgression which he committed against the LORD, even against the word of the LORD, which he kept not, and also for asking counsel of one that had a familiar spirit, to inquire of it;