But do not neglect the Levite in your community, for he has no hereditary portion as you have. Every third year you shall bring out the full tithe of your yield of that year, but leave it within your settlements. Then the Levite, who has no hereditary portion as you have, and the stranger, the fatherless, and the widow in your settlements shall come and eat their fill, so that the LORD your God may bless you in all the enterprises you undertake.
Deuteronomy 14:27-29