1 Chronicles (Author Compiled by Isaiah and Ezra from records of Nathan, Gad, Iddo, Ahijah, Jehu and others.)
12:37And from the other side of the Jordan, of the Reubenites, and the Gadites, and of the half tribe of Manasseh, with all manner of weapons of war for battle, a hundred and twenty thousand.
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.