Numbers 18:11-13

“This also is yours: whatever is set aside from the gifts of all the wave offerings of the Israelites. I give this to you and your sons and daughters as your perpetual share. Everyone in your household who is ceremonially clean may eat it. “I give you all the finest olive oil and all the finest new wine and grain they give the LORD as the firstfruits of their harvest. All the land’s firstfruits that they bring to the LORD will be yours. Everyone in your household who is ceremonially clean may eat it.