Leviticus 6:13-17

¹³Fire shall be kept burning on the altar continually; it shall not go out.

¹⁴“‘This is the law of the meal offering: the sons of Aaron shall offer it before Yahweh, before the altar.

¹⁵He shall take from there his handful of the fine flour of the meal offering, and of its oil, and all the frankincense which is on the meal offering, and shall burn it on the altar for a pleasant aroma, as its memorial portion, to Yahweh.

¹⁶That which is left of it Aaron and his sons shall eat. It shall be eaten without yeast in a holy place. They shall eat it in the court of the Tent of Meeting.

¹⁷It shall not be baked with yeast. I have given it as their portion of my offerings made by fire. It is most holy, as are the sin offering and the trespass offering.