Numbers 31:29-31

Take it from their half and give it to Eleazar the priest as a contribution to the LORD. And from the people of Israel’s half you shall take one drawn out of every fifty, of the people, of the oxen, of the donkeys, and of the flocks, of all the cattle, and give them to the Levites who keep guard over the tabernacle of the LORD.” And Moses and Eleazar the priest did as the LORD commanded Moses.