Commentaire sur Le Lévitique 2:3

לאהרן ולבניו AND THAT WHICH IS LEFT OF THE MEAL OFFERING] SHALL BE AARON’S AND HIS SONS’ — The High Priest takes a portion first, just as he pleases, without having to take part in the equal division of the מנחה, whilst the ordinary priest shares in an equal division (Sifra, Vayikra Dibbura d'Nedavah, Chapter 11 1; Yoma 14a and Yoma 17b).

Takes a portion first. Otherwise, why does it say, “Aharon and his sons”? Is he worse than his sons? Rather, it must mean that he takes a portion first, without a distribution.

קדש קדשים MOST HOLY is it for them.

After the [fire-]offerings. I.e., Aharon and his sons may have a portion of what remains of the meal-offering for eating only after the fistful was burned for the sake of Hashem and it becomes a fire-offering of Hashem.

'מאשי ה OF THE FIRE OFFERING OF THE LORD — they have no portion in it (in what is left) except after the gifts (the prescribed quantity) for the fire (i. e. the קומץ) have been offered (Sifra, Vayikra Dibbura d'Nedavah, Chapter 11 2).