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