The firstfruits of your grain, of your wine and of your oil, and the first fleece of your sheep, you shall give him.
Deuteronomy 18:4

Grain, wine, oil, and fleece in this verse aren't meant to limit the firstfruits offerings. They are only stand-ins for all the products of human labor and wealth.

There is no functioning Levitical priesthood on earth and I don't know any believing Levites in my local community, so I try to honor this commandment by giving away some of the first harvest from my garden to friends, family, and neighbors.