Numbers 18:12-13

18:12 “All the best of the olive oil and all the best of the wine and of the wheat, the first fruits of these things that they give to the Lord, I have given to you. 18:13 And whatever first ripe fruit in their land they bring to the Lord will be yours; everyone who is ceremonially clean in your household may eat of it.

Deuteronomy 12:17-18

12:17 You will not be allowed to eat in your villages your tithe of grain, new wine, olive oil, the firstborn of your herd and flock, any votive offerings you have vowed, or your freewill and personal offerings. 12:18 Only in the presence of the Lord your God may you eat these, in the place he chooses. This applies to you, your son, your daughter, your male and female servants, and the Levites in your villages. In that place you will rejoice before the Lord your God in all the output of your labor.

Deuteronomy 14:28-29

14:28 At the end of every three years you must bring all the tithe of your produce, in that very year, and you must store it up in your villages. 14:29 Then the Levites (because they have no allotment or inheritance with you), the resident foreigners, the orphans, and the widows of your villages may come and eat their fill so that the Lord your God may bless you in all the work you do.

Deuteronomy 18:4

18:4 You must give them the best of your grain, new wine, and olive oil, as well as the best of your wool when you shear your flocks.

Proverbs 3:9

3:9 Honor the Lord from your wealth

and from the first fruits of all your crops;