Numbers 15:17-21
17 The Lord instructed Moses:
18 “Speak to the Israelites and tell them: After you enter the land where I am bringing you,
19 you are to offer a contribution to the Lord when you eat from the food of the land.
20 You are to offer a loaf from your first batch of dough(A) as a contribution; offer it just like a contribution from the threshing floor.(B)
21 Throughout your generations, you are to give the Lord a contribution from the first batch of your dough.