1 Samuel 15:11, 23, 26, 28

It repenteth me that I have set up Saul to be king: for he is turned back from following me, and hath not performed my commandments. And it grieved Samuel; and he cried unto the LORD all night.

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.

And Samuel said unto Saul, I will not return with thee: for thou hast rejected the word of the LORD, and the LORD hath rejected thee from being king over Israel.

And Samuel said unto him, The LORD hath rent the kingdom of Israel from thee this day, and hath given it to a neighbour of thine, that is better than thou.