2 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
9:25And there are to Solomon four thousand stalls for horses and chariots, and twelve thousand horsemen, and he placed them in cities of the chariot, and with the king in Jerusalem.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.