Deuteronomy 14:28–29

28 “At the end of every three years, bring a tenth of all your produce for that year and store it within your city gates. 29 Then the Levite, who has no portion or inheritance among you, the resident alien, the fatherless, and the widow within your city gates may come, eat, and be satisfied.k And the Lord your God will bless you in all the work of your hands that you do.l