Leviticus 2:1-2, 4-5, 15-16

‘When anyone presents a grain offering to the Lord, his offering shall be of fine flour, and he shall pour [olive] oil over it and put frankincense on it. He shall bring it to Aaron’s sons the priests. Out of it he shall take a handful of the fine flour and oil, with all of its frankincense, and the priest shall offer this up in smoke on the altar [of burnt offering] as the memorial portion of it. It is an offering by fire, a sweet and soothing aroma to the LORD.

‘When you bring an offering of grain baked in the oven, it shall be unleavened cakes of fine flour mixed with oil, or unleavened wafers spread with oil. If your offering is grain baked on a griddle, it shall be of fine unleavened flour, mixed with oil.

You shall put oil on it and lay incense on it; it is a grain offering. The priest shall offer up in smoke its memorial portion, part of the crushed grain and part of its oil with all its incense; it is an offering by fire to the LORD.