Numbers 6:18-19

18And the Nazirite shall shave his consecrated head at the entrance of the tent of meeting and shall take the hair from his consecrated head and put it on the fire that is under the sacrifice of the peace offering.

19And the priest shall take the shoulder of the ram, when it is boiled, and one unleavened loaf out of the basket and one unleavened wafer, and shall put them on the hands of the Nazirite, after he has shaved the hair of his consecration,