Numbers 6:18-19

18And the Nazarite shall shave the head of his consecration at the entrance to the tent of meeting, and shall take the hair of the head of his consecration, and put it on the fire which is under the sacrifice of the peace-offering.

19And the priest shall take the boiled shoulder of the ram, and one unleavened cake out of the basket, and one unleavened wafer, and shall put them upon the hands of the Nazarite, after he hath shaven [the hair of] his consecration.