Leviticus 9:10 - Wesley's Explanatory Notes

He burnt it — By ordinary fire, which was used until the fire came down from heaven, Leviticus 9:24, though afterwards it was forbidden. And if it had not been allowed otherwise, yet this being done by Aaron at the command of Moses, and consequently with God's approbation, it was unquestionably lawful. Add to this, that there is nothing said to be consumed by that heavenly fire, but the burnt — offering with the fat belonging to it, namely, that burnt — offering mentioned Leviticus 9:16, which therefore is not there said to be burnt, as it is said of the other burnt — offering, Leviticus 9:13, and of the rest of the sacrifices in their places.