1 Samuel 15:13-14, 22-23

And Samuel came to Saul: and Saul said unto him, Blessed be thou of the LORD: I have performed the commandment of the LORD. And Samuel said, What meaneth then this bleating of the sheep in mine ears, and the lowing of the oxen which I hear?

And Samuel said, Hath 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 hearken than the fat of rams. For rebellion is as the sin of witchcraft, And stubbornness is as iniquity and idolatry. Because thou hast rejected the word of the LORD, He hath also rejected thee from being king.