Numbers 31:28-30

ASV(i) 28 And levy a tribute unto Jehovah of the men of war that went out to battle: one soul of five hundred, [both] of the persons, and of the oxen, and of the asses, and of the flocks: 29 take it of their half, and give it unto Eleazar the priest, for Jehovah's heave-offering. 30 And of the children of Israel's half, thou shalt take one drawn out of every fifty, of the persons, of the oxen, of the asses, and of the flocks, [even] of all the cattle, and give them unto the Levites, that keep the charge of the tabernacle of Jehovah.