Numbers 31:30

And of the children of Israel's half, thou shalt take (l) one portion of fifty, of the persons, of the beeves, of the asses, and of the flocks, of all manner of beasts, and give them unto the Levites, which keep the charge of the tabernacle of the LORD.

(l) The Israelites who had not been at war, of every fiftieth paid one to the Lord: and the soldiers one of every five hundred.