Or HaChaim on Tetzaveh 29:27

English: מאשר לאהרון ומאשר לבניו . "of that which is Aharon's and of that which is his sons'". Why was this phrase needed at all? Perhaps the Torah meant to inform us that Moshe was allowed to eat these parts only in this instance. He would not be permitted to eat of the breast or thigh of any other sacrificial offerings in the future, they would be exclusively Aharon's and his sons.