Numbers 6:18-19

18And the Nazirite shall shave the head of his separation at the door of the tent of meeting, and shall take the hair of the head of his separation, and put it on the fire which is under the sacrifice of peace-offerings. 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 Nazirite, after he hath shaven the head of his separation;