Numbers 15:17-21 - Rules For First Fruits
17 And Jehovah speaketh unto Moses, saying, 18 'Speak unto the sons of Israel, and thou hast said unto them, In your coming in unto the land whither I am bringing you in, 19 then it hath been, in your eating of the bread of the land, ye heave up a heave-offering to Jehovah; 20 the beginning of your dough a cake ye heave up -- a heave-offering; as the heave-offering of a threshing-floor, so ye do heave it. 21 Of the beginning of your dough ye do give to Jehovah a heave-offering -- to your generations.