Reference for Menachot 12:3

אלמא כיון דתנא ליה כל ולא קתני חוץ כולהו משמע ה"נ כיון דתנא כל ולא קתני חוץ כולהו משמע

too the Mishnah should have stated: 'Whether it is an ordinary sin-offering or any other offering, if a non-priest or a priest that was in mourning received the blood. [it is invalid]', and we would have explained that it was necessary [to be so stated] according to R'Simeon's view.

Jastrow