Apostasy: Saul

“I will not return with you,” Samuel replied. “For you have rejected the word of the LORD, and He has rejected you as king over Israel.” …

So Saul was afraid of David, because the LORD was with David but had departed from Saul.

Then Samuel said to Saul, “Why have you disturbed me by bringing me up?” “I am deeply distressed,” replied Saul. “The Philistines are fighting against me, and God has turned away from me. He no longer answers me, either by prophets or by dreams. So I have called on you to tell me what to do.”

Because you did not obey the LORD or carry out His burning anger against Amalek, the LORD has done this to you today.