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