[If] he shaved [his head] following the sacrifice and it was found [to be] invalid —- his shaving is invalid and his sacrifices do not count for him.  [If] he shaved after a sin-offering [which was slaughtered] not for its designated purpose, and then he brought his offerings for their designated purpose —- his shaving is invalid and his sacrifices do not count for him. [If] he shaved after the burnt-offering or after the peace-offering [which were slaughtered] not for their designated purpose, and then he brought his offerings for their designated purpose —- his shaving is invalid and his sacrifices do not count for him. R’ Shimon says: That sacrifice does not count for him, but the other sacrifices do count for him. If he shaved after [all] three and one of them was found to be valid —- his shaving is valid and he brings the other sacrifices.