Numbers 6:18-19

18The Nazirite is then to shave the hair of his dedication at the entrance of the Tent of Meeting, and he is to take the hair of his dedication and put it into the fire of the fellowship offering sacrifice.

19The kohen is to take the boiled shoulder of the ram and one matzah cake and one matzah wafer from the basket, and he is to place them into the hands of the Nazirite after he has shaved the hair of his dedication.