Deuteronomy 26:12-13

12“When you finish tithing the full tenth of your produce in the third year, the year of the tithe, you are to give it to the Levite, to the outsider, to the orphan and to the widow, so that they may eat within your town gates and be satisfied.

13Then you are to say before Adonai your God, ‘I have removed the holy tithe from my house and also have given it to the Levite and to the outsider, to the orphan and to the widow, according to all Your mitzvah that You have commanded me. I have not transgressed or forgotten any of Your mitzvot.