Numbers 6:18-19

181The Nazirite shall then shave his consecrated head of hair at the entrance of the tent of meeting, and take the consecrated hair of his head and put it on the fire which is under the sacrifice of peace offerings.

192And the priest shall take the ram’s shoulder when it has been boiled, and one unleavened loaf from the basket and one unleavened wafer, and shall put them on the 3hands of the Nazirite after he has shaved his consecrated hair.