2 Samuel (Author Compiled by Isaiah from records of Samuel, David, Nathan, and Gad.)
17:21And it came to pass, after they were departed, that they came up out of the well, and went and told king David, and said unto David, Arise, and pass quickly over the water: for thus hath Ahithophel counselled against you.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.