Midrash for Chullin 195:39

(Bamidbar 6:19) "And the Cohein shall take the cooked ("beshelah") shoulder of the ram": "beshelah" connotes "whole" (i.e., it is first cooked and then separated from the ram.) R. Shimon b. Yochai says: "beshelah" implies only that it must be cooked together with the ram, (but it is separated before the cooking.) "and one unleavened cake": If it were broken or part were missing, it is invalid. "and one unleavened wafer": If it were broken or part were missing it is invalid. "and he shall place them on the palms of the Nazirite after his shaving of (the head of) his Naziritism.": This is after his shaving, but the bringing of the offerings is not after his shaving.