Deuteronomy 14:28

“Now to the sons of Levi, behold, I have given all the tithe in Israel for an inheritance, in return for their service which they perform, the service of the tent of meeting.

“When you have finished paying all the tithe of your produce in the third year, the year of tithing, then you shall give it to the Levite, to the sojourner, to the orphan, and to the widow, that they may eat within your gates and be satisfied.

Now the sons of Israel and Judah who lived in the cities of Judah also brought in the tithe of oxen and sheep, and the tithe of the holy gifts which were made holy to Yahweh their God, and put them in heaps.

“Bring the whole tithe into the storehouse, so that there may be food in My house, and test Me now in this,” says Yahweh of hosts, “if I will not open for you the windows of heaven and empty out for you a blessing until it is beyond enough.