2Ch 2 Chronicles, chapter Second Book of Chronicles, chapter 25
And Amaziah gathers Judah and appoints them according to the house of the fathers, for heads of the thousands and for heads of the hundreds, for all Judah and Benjamin; and he inspects them from a son of twenty years and upward, and finds them [to be] three hundred thousand chosen ones, going forth to the host, holding spear and buckler. Num 1:3