1 Samuel 15:13-14, 22-23

And Samuel came to Saul, and Saul said to him, “Blessed be you to the LORD. I have performed the commandment of the LORD.” And Samuel said, “What then is this bleating of the sheep in my ears and the lowing of the oxen that I hear?”

And Samuel said, “Has the LORD as great delight in burnt offerings and sacrifices, as in obeying the voice of the LORD? Behold, to obey is better than sacrifice, and to listen than the fat of rams. For 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.”