'Fifties' in the Bible

But do thou provide among all the people able men, such as fear God, men of truth, hating covetousness; and place them over them, chiefs of thousands, chiefs of hundreds, chiefs of fifties, and chiefs of tens,

And Moses chose able men out of all Israel, and made them heads over the people, chiefs of thousands, chiefs of hundreds, chiefs of fifties, and chiefs of tens.

So I took the chiefs of your tribes, wise men and known, and made them chiefs over you, captains of thousands, and captains of hundreds, and captains of fifties, and captains of tens, and officers for your tribes.

and he will take them that he may appoint for himself captains over thousands, and captains over fifties, and that they may plough his ground, and reap his harvest, and make his instruments of war and instruments of his chariots.

Behold, there came down fire from the heavens, and consumed the two captains of the former fifties with their fifties; but now, let my life be precious in thy sight.