Numbers 15:17-21 - Rules For First Fruits
17 Then the LORD instructed Moses: 18 "Tell the Israelis that when they enter the land that I'm about to bring you to, 19 when you have eaten some of the bread that the land produces, you are to offer a raised offering to the LORD. 20 You are to offer a cake made from the first of your bread dough as a raised offering to the LORD. Offer it as a raised offering right off your threshing floor. 21 From then on, throughout your generations give the first of your bread dough to the LORD."