Numbers 15:17-21 - Rules For First Fruits
17 Yahweh spoke to Moses, saying, 18 "Speak to the {Israelites} and say to them, 'When you come into the land to which I [am about] to bring you, 19 whenever you eat from the food of the land, you will lift up a contribution to Yahweh. 20 You must lift up a contribution of the first [batch] of your ring-shaped dough bread; you must lift it up as a contribution of the threshing floor. 21 You will give to Yahweh a contribution from the first of your dough throughout your generations.