Deuteronomy 26:12-13

12When you have finished setting aside a tenth of all your produce in the third year, the year of the tithe, you shall give it to the Levite, the foreigner, the fatherless and the widow, so that they may eat in your towns and be satisfied. 13Then say to the Lord your God: “I have removed from my house the sacred portion and have given it to the Levite, the foreigner, the fatherless and the widow, according to all you commanded. I have not turned aside from your commands nor have I forgotten any of them.