First Book of Kings (Author Compiled by Isaias from records of Samuel, David, Nathan, and Gad.)
6:19percussit autem de viris bethsamitibus eo quod vidissent arcam Domini et percussit de populo septuaginta viros et quinquaginta milia plebis luxitque populus quod percussisset Dominus plebem plaga magna
Original from The Bible Foundation - bf.org. They claim public domain status for their original text.