Deuteronomy 14:22; Deuteronomy 26:12

22 Thou shalt truly tithe all the increase of thy seed, that the field bringeth forth year by year.
12 When thou hast made an end of tithing all the tithes of thine increase the third year, which is the year of tithing, and hast given it unto the Levite, the stranger, the fatherless, and the widow, that they may eat within thy gates, and be filled;
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