Num 6:19-20
When this had been done, the priest took the boiled shoulder of the ram, with an unleavened cake and wafer out of the basket, and placed these pieces in the hands of the Nazarite, and waved them before Jehovah. They then became the portion of the priest, in addition to the wave-breast and heave-leg which fell to the priest in the case of every peace-offering (Lev 7:32-34), to set forth the participation of the Lord in the sacrificial meal. But the fact that, in addition to these, the boiled shoulder was given up symbolically to the Lord through the process of waving, together with a cake and wafer, was intended to indicate that the table-fellowship with the Lord, shadowed forth in the sacrificial meal of the peace-offering, took place here in a higher degree; inasmuch as the Lord directed a portion of the Nazarite’s meal to be handed over to His representatives and servants for them to eat, that he might thus enjoy the blessedness of having fellowship with his God, in accordance with that condition of priestly sanctity into which the Nazarite had entered through the vow that he had made.