Leviticus 1:7 - Clarke's commentary and critical notes on the Bible

And the sons of Aaron the priest shall put fire upon the altar, and lay the wood in order upon the fire: Put fire - The fire that came out of the tabernacle from before the Lord, and which was kept perpetually burning; see Leviticus 9:24. Nor was it lawful to use any other fire in the service of God. See the case of Nadab and Abihu, Leviticus 10 (note).