The Tithe of the Feasts (Deuteronomy 12:5-19)
5But you shall seek the place where the Lord your God chooses, out of all your tribes, to put His name for His dwelling place; and there you shall go. 6There you shall take your burnt offerings, your sacrifices, your tithes, the heave offerings of your hand, your vowed offerings, your freewill offerings, and the firstborn of your herds and flocks. 7And there you shall eat before the Lord your God, and you shall rejoice in all to which you have put your hand, you and your households, in which the Lord your God has blessed you. 8You shall not at all do as we are doing here today—every man doing whatever is right in his own eyes— 9for as yet you have not come to the rest and the inheritance which the Lord your God is giving you. 10But when you cross over the Jordan and dwell in the land which the Lord your God is giving you to inherit, and He gives you rest from all your enemies round about, so that you dwell in safety, 11then there will be the place where the Lord your God chooses to make His name abide. There you shall bring all that I command you: your burnt offerings, your sacrifices, your tithes, the heave offerings of your hand, and all your choice offerings which you vow to the Lord. 12And you shall rejoice before the Lord your God, you and your sons and your daughters, your male and female servants, and the Levite who is within your gates, since he has no portion nor inheritance with you. 13Take heed to yourself that you do not offer your burnt offerings in every place that you see; 14but in the place which the Lord chooses, in one of your tribes, there you shall offer your burnt offerings, and there you shall do all that I command you.
15″However, you may slaughter and eat meat within all your gates, whatever your heart desires, according to the blessing of the Lord your God which He has given you; the unclean and the clean may eat of it, of the gazelle and the deer alike. 16Only you shall not eat the blood; you shall pour it on the earth like water. 17You may not eat within your gates the tithe of your grain or your new wine or your oil, of the firstborn of your herd or your flock, of any of your offerings which you vow, of your freewill offerings, or of the heave offering of your hand. 18But you must eat them before the Lord your God in the place which the Lord your God chooses, you and your son and your daughter, your male servant and your female servant, and the Levite who is within your gates; and you shall rejoice before the Lord your God in all to which you put your hands. 19Take heed to yourself that you do not forsake the Levite as long as you live in your land.
The Israelites were instructed as to where to go to give their tithes (wherever the tabernacle/presence of God was), and the manner in which they should be eaten (as a family/nation, with rejoicing, especially including the Levites). Unlike the tithe described in Numbers, which was given to the Levites, this tithe was consumed by the ones doing the tithing, and was not specifically dedicated to the Lord. THIS TITHE WAS ASSOCIATED WITH THE FEASTS AND FESTIVALS.