Numbers 15:2, 18-21

Speak unto the children of Israel, and say unto them, When ye be come into the land of your habitations, which I give unto you

Speak unto the children of Israel, and say unto them, When ye come into the land whither I bring you, then it shall be, that, when ye eat of the bread of the land, ye shall offer up an heave offering unto the LORD. Ye shall offer up a cake of the first of your dough for an heave offering: as ye do the heave offering of the threshingfloor, so shall ye heave it. Of the first of your dough ye shall give unto the LORD an heave offering in your generations.