1 Samuel 15:22-24
English Standard Version
23For rebellion is as the sin of divination, and presumption is as iniquity and idolatry. Because you have rejected the word of the Lord, he has also rejected you from being king."
24Saul said to Samuel, "I have sinned, for I have transgressed the commandment of the Lord and your words, because I feared the people and obeyed their voice.