Numbers 6:18-19

18“Then the Nazirites will shave their heads at the entrance of the Tabernacle. They will take the hair that had been dedicated and place it on the fire beneath the peace-offering sacrifice.

19After the Nazirite’s head has been shaved, the priest will take for each of them the boiled shoulder of the ram, and he will take from the basket a cake and a wafer made without yeast. He will put them all into the Nazirite’s hands.