Saul died because he was unfaithful to the LORD; he did not keep the word of the LORD and even consulted a medium for guidance
So Saul died for his trespass against the Lord [in sparing Amalek], for his unfaithfulness in not keeping God's word, and also for consulting [a medium with] a spirit of the dead to inquire pleadingly of it,
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 enquire of it;
Saul said to his armor-bearer, "Draw your sword and run me through, or these uncircumcised fellows will come and abuse me." But his armor-bearer was terrified and would not do it; so Saul took his own sword and fell on it.
Then Saul said to his armor-bearer, Draw your sword and thrust me through with it, lest these uncircumcised come and abuse and make sport of me. But his armor-bearer would not, for he was terrified. So Saul took his own sword and fell on it.
Then said Saul to his armourbearer, Draw thy sword, and thrust me through therewith; lest these uncircumcised come and abuse me. But his armourbearer would not; for he was sore afraid. So Saul took a sword, and fell upon it.