Numbers 6:18-19

18“The Nazirite is to shave his consecrated head at the entrance to the tent of meeting, take the hair from his head, and put it on the fire under the fellowship sacrifice.

19The priest is to take the boiled shoulder from the ram, one unleavened cake from the basket, and one unleavened wafer, and put them into the hands of the Nazirite after he has shaved his consecrated head.