Matthew Poole and continuators on Leviticus 10:1

1 AND Nadab and Abihu the sons of Aaron, took either of them his censer, and put fire therein, and put incense thereon, and offered strange fire before the LORD , which he commanded them not .

So called, as not appointed for, nor belonging to, the present work, fire not taken from the Altar as it ought, but from some common fire.

Upon the Altar of incense.

For seeing Moses himself neither did nor might do any thing in Gods worship without Gods command, which is oft noted of him, for these to do it was a more unpardonable and inexcusable presumption. Besides, not commanding may be here put for forbidding, as it is Ier. 32. 35. Now as this was forbidden implicitly, Lev. 6. 12. especially when God himself, made a comment upon that text and by sending fire from heaven declared of what fire he there spake, so it is more than probable it was forbidden expresly, though that be not here mentioned, nor was it necessary it should be.

Marginal references: Numb. 3. 4. and 26. 61. 1 Chron. 24. 2.