וְכָל־מִנְחַ֥ת כֹּהֵ֛ן כָּלִ֥יל תִּהְיֶ֖ה לֹ֥א תֵאָכֵֽל׃ (פ)
De même, toute oblation d’un pontife sera brûlée entièrement, on n’en mangera point."
Guide for the Perplexed
The oblation of the priest was entirely burnt (Lev. 6:16), because the priest offered up his oblation by himself, and if he were to offer it, and at the same time to eat it, it would appear as if he had not performed any service. For nothing was offered upon the altar of the ordinary oblations of any person except the frankincense and a handful of the flour or cake; and if, in addition to the fact that the offering was small, he who offered it were himself to eat it, nothing of a sacrificial service would be noticed. It is therefore entirely burnt (Lev. 6:16).