From the first of your dough, you are to lift up a cake as a contribution; offer it just like an offering from the threshing floor.
20. Ye shall offer up a cake. Here another kind of first-fruits is required, to offer up sacred cakes of the first of their dough. First-fruits were offered of their fruits and ears of corn; but the representation was more lively in the bread itself; and, consequently, God would have them present tokens of their gratitude, not only from the barn, but from the mill...
Here we have, I. Full instructions given concerning the meat-offerings and drink-offerings, which were appendages to all the sacrifices of animals. The beginning of this law is very encouraging: When you come into the land of your habitation which I give unto you, they you shall do so and so, Num 15:2.
Commenting on Numbers 15:1-21
Of the first of your dough shall ye give unto the Lord,.... As an acknowledgment of his being the sovereign Lord and possessor of heaven and earth, and of his being the owner and proprietor of the land of Canaan; and by way of thankfulness to him for the plenty of bread corn he had given them; and wherefore this cake was to he heaved...