1 Samuel (Author Compiled by Isaiah from records of Samuel, David, Nathan, and Gad.)
8:11And he said, This will be the manner of the king that shall reign over you: He will take your sons, and appoint them for himself, for his chariots, and to be his horsemen; and some shall run before his chariots.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.