'Fifties' in the Bible
And you will select from all the people men of ability, fearers of God, trustworthy men, haters of [dishonest] gain, and you will appoint [such men] over them [as] commanders of thousands, commanders of hundreds, commanders of fifties, and commanders of tens.
And Moses chose men of ability from all Israel, and he appointed them [as] heads over the people, [as] commanders of thousands, commanders of hundreds, commanders of fifties, and commanders of tens.
And so I took the leaders of your tribes, wise and knowledgeable men, and [then] I appointed them as leaders over you [as] commanders of [groups of] thousands and commanders of [groups of] hundreds and commanders of [groups of] fifties and commanders of [groups of] tens [as] officials for your tribes.
He will appoint for himself commanders of thousands and commanders of fifties, and [those] {to do his plowing} and to reap his harvest, and [those] to make weapons of war and the equipment for his chariots.
It had happened that when Jezebel killed the prophets of Yahweh, Obadiah took a hundred prophets and hid them {by fifties} in the cave and sustained them [with] food and water.)
Has it not been told to my lord what I did when Jezebel killed the prophets of Yahweh? I hid a hundred men of the prophets of Yahweh {by fifties} in the cave, and I sustained them [with] food and water.
Behold, fire from heaven came down and consumed the first two commanders of fifty and their fifties, so then let my life be precious in your eyes."