"The first fruits of your land that ripen you shall bring to the house of G‑d, your G‑d"—Exodus 23:19.
We are commanded to separate the first fruit that ripen and bring them to the Holy Temple, where they are given to the priests.
This mitzvah only applies when the Temple is standing, and only to produce of the "Seven Kinds" [wheat, barley, grapes, figs, dates, pomegranates, and olives] that grew in Israel (on the east or west bank of the Jordan) and certain lands that adjoin Israel.
