2 Kings (Author Compiled by Isaiah and Jeremiah from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
18:23And now, engage, I pray thee, with my master the king of Assyria, and I will give thee two thousand horses, if thou canst set the riders upon them.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.