Once the Nazirites have shaved, the priest will take the boiled shoulder from the ram, one bread without yeast from the basket, and one wafer without yeast, and place them in their hands.
Moses told Aaron and his sons, “You are to boil the meat at the entrance to the Tent of Meeting, and then eat it there with the bread that is in the basket of offerings for the ordination, as I ordered: ‘It is for Aaron and his sons to eat.’
In fact even before the fat of the sacrifice was burned up the servant would come and would demand from the man sacrificing, “Give me meat to roast for the priest. He doesn't want boiled meat from you—he wants it raw.”