Deuteronomy 14:22-23

Thou shalt truly tithe all the increase of thy seed There were three sorts of tithes to be paid from the people, besides those from the Levites to the priests; 1st, To the Levites for their maintenance, Leviticus 27:30; Numbers 18:21. These were to be eaten where they dwelt, (Numbers 14:31,) and therefore to be paid there. 2d, For the Lord's feasts and sacrifices, to be eaten by the offerers at Jerusalem: these are here intended. 3d, Besides these two, there was to be every third year a tithe for the poor, to be eaten at their own dwellings, Deuteronomy 14:28. That thou mayest learn to fear the Lord thy God That thou mayest not only be accustomed to the worship of Jehovah thy God, but mayest become truly pious. For the fear of God was taught in that place of his public worship, and the very presenting themselves before him was a good means to keep them in awe of him.