John Calvin Commentary Leviticus 8:1

"And Jehovah spake unto Moses, saying," — Leviticus 8:1 (ASV)

And the Lord spoke. It is well known that in conjunction with the sacrifices there was an offering, which they call minha, but we will see elsewhere that this was also used separately; for it was lawful without a victim to offer either plain meal, or cakes, or wafers seasoned with oil.

Therefore, besides the sacrifice of consecration, of which Moses has already treated, this second offering is required from the priest: that he should present at his inauguration a cake fried in a pan and cut in pieces.

The reason for this appears to have been that he might thereby become the legitimate minister of all the people, and might duly offer in the name of others, once he had done what was right for himself.

But a distinction is drawn between the requirement for the priest and that for the people, namely, that it should be wholly burnt. The reason for this, which will be explained elsewhere, it will now be sufficient to mention briefly.

The fact was that God was unwilling for the priests to indulge themselves in vain ostentation, which might easily have been the case if the oblation had been preserved for their use, like the minha of the people which remained in their hands.