1 Samuel (Author Compiled by Isaiah from records of Samuel, David, Nathan, and Gad.)
17:20And David riseth early in the morning, and leaveth the flock to a keeper, and lifteth up, and goeth, as Jesse commanded him, and he cometh in to the path, and to the force which is going out unto the rank, and they have shouted for battle;
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.