Numbers 18:12

Now may God give you of the dew of heaven, And of the fatness of the earth, And an abundance of grain and new wine;

“Now this shall be the legal judgment for the priests taken from the people, from those who offer a sacrifice, either an ox or a sheep: they shall give to the priest the shoulder and the two cheeks and the stomach.

“You shall give him the first fruits of your grain, your new wine and your oil and the first shearing of your sheep.

“And the first of all the first fruits of every kind and every contribution of every kind, from all your contributions, shall be for the priests; you shall also give to the priest the first of your dough to cause a blessing to rest on your house.

Do you not know that those who perform sacred services eat the food of the temple, and those who attend regularly to the altar have their share from the altar?