1 Samuel (Author Compiled by Isaiah from records of Samuel, David, Nathan, and Gad.)
15:11It 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.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.