Leviticus 3:5
And Aaron's sons shall burn it on the altar on the burnt sacrifice, which is on the wood that is on the fire: it is an offering made by fire, of a sweet smell to the LORD.
Torrey's Topical Textbook—AKJV

Leviticus 6:12,13
And the fire on the altar shall be burning in it; it shall not be put out: and the priest shall burn wood on it every morning, and lay the burnt offering in order on it; and he shall burn thereon the fat of the peace offerings.
Torrey's Topical Textbook—AKJV