Numbers 18:11-13

¹¹And this is yours: the lifted offering which they give and all the wave offerings of the children of Israel I have given to you and to your sons and to your daughters as your right for ever: everyone in your house who is clean may have them for food.

¹²All the best of the oil and the wine and the grain, the first-fruits of them which they give to the Lord, to you have I given them.

¹³The earliest produce from their land which they take to the Lord is to be yours; everyone in your house who is clean may have it for his food.