Numbers 18:11-13

“You also get the Wave-Offerings from the People of Israel. I present them to you and your sons and daughters as a gift. This is the standing rule. Anyone in your household who is ritually clean may eat it. I also give you all the best olive oil, the best new wine, and the grain that is offered to GOD as the firstfruits of their harvest—all the firstfruits they offer to GOD are yours. Anyone in your household who is ritually clean may eat it.