וְהַלֵּוִ֥י אֲשֶׁר־בִּשְׁעָרֶ֖יךָ לֹ֣א תַֽעַזְבֶ֑נּוּ כִּ֣י אֵ֥ין ל֛וֹ חֵ֥לֶק וְנַחֲלָ֖ה עִמָּֽךְ׃ (ס)
And the Levite that is within thy gates, thou shalt not forsake him; for he hath no portion nor inheritance with thee.
Sifrei Devarim
(Devarim 14:27) "And the Levite who is in your gate, you shall not forsake him" (by not giving him first tithe): Wherever you find this Levite, give him of his portion (first-tithe). If he does not have his portion, he gives him second-tithe. If he does not have second-tithe, he gives him poor-tithe. If he does not have poor-tithe, he gives him peace-offerings. If he does not have peace-offerings, he feeds him from charity, it being written (26) "you … (27) and the Levite."