John Gill Commentary Leviticus 9:11

"And the flesh and the skin he burnt with fire without the camp." — Leviticus 9:11 (ASV)

And the flesh and the hide he burnt with fire without the
camp .
] With common fire, for the fire from the Lord came only upon the altar, which perhaps may be the reason of this expression being used when anything was burnt without the camp, and not on the altar, see (Exodus 29:14) (Leviticus 8:17) . Jarchi observes, that we do not find a sin offering burnt without the camp but this; which is a great mistake; see (Leviticus 4:11Leviticus 4:12Leviticus 4:20Leviticus 4:21) (8:17) .