Deuteronomy 14:22-23
Context14:22 You must be certain to tithe 1 all the produce of your seed that comes from the field year after year. 14:23 In the presence of the Lord your God you must eat from the tithe of your grain, your new wine, 2 your olive oil, and the firstborn of your herds and flocks in the place he chooses to locate his name, so that you may learn to revere the Lord your God always.