Leviticus 6:11-18

11And he shall put off his garments, and put on other garments, and carry forth the ashes without the camp unto a clean place. 12And the fire upon 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 upon it; and he shall burn thereon the fat of the peace offerings. 13The fire shall ever be burning upon the altar; it shall never go out.

14And this is the law of the grain offering: the sons of Aaron shall offer it before Yhwh, before the altar. 15And he shall take of it his handful, of the flour of the grain offering, and of the oil thereof, and all the frankincense which is upon the grain offering, and shall burn it upon the altar for a sweet savour, even the memorial of it, unto Yhwh. 16And the remainder thereof shall Aaron and his sons eat: with unleavened bread shall it be eaten in the holy place; in the court of the tabernacle of the congregation they shall eat it. 17It shall not be baken with leaven. I have given it unto them for their portion of my offerings made by fire; it is most holy, as is the sin offering, and as the trespass offering. 18All the males among the children of Aaron shall eat of it. It shall be a statute for ever in your generations concerning the offerings of Yhwh made by fire: every one that toucheth them shall be holy.