Deuteronomy 12:17-19

You are forbidden to eat within your [city] gates the tithe of your grain or new wine or oil, or the firstborn of your herd or flock, or any of your votive offerings, or your freewill offerings, or the contribution of your hand. But you shall eat them before the LORD your God in the place which the LORD your God will choose, you and your son and your daughter, and your male and female servants, and the Levite who is within your [city] gates; and you shall rejoice before the LORD your God in all that you undertake. Be careful that you do not neglect the Levite [who serves God] as long as you live in your land.