Reference for Shevuot 47:3

מידי הוא טעמא אלא משום איסור כולל רבי שמעון לטעמיה דלית ליה איסור כולל דתניא רבי שמעון אומר האוכל נבילה ביוה"כ פטור

R. Mari said: We have also learnt thus: 'I VOW THAT MY WIFE SHALL NOT BENEFIT FROM ME IF I HAVE EATEN TO-DAY,' AND HE HAD EATEN CARRION, TREFA, FORBIDDEN ANIMALS, AND REPTILES, HIS WIFE IS PROHIBITED TO HIM. [Hence, eating carrion is also called eating!] - How now? There, since first he ate, and then he swore,

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