A profound religious awakening at the dawn of the Second Temple era inspired the people to renew their commitment to the spiritual leaders of their community. To ensure the survival and well-being of the priests and Levites, the nation made a firm pledge to observe the commandments regarding agricultural gifts, offering the fruit of their land and labor.
The distribution begins with the gifts designated for the priests. The people committed to separating a portion of their dough during kneading, alongside their grain offerings. They also brought the fruit of every tree, specifically focusing on wine and olive oil, which were presented to the priests after the entire preparation process was complete [רלב״ג, מצודת ציון, ביאור שטיינזלץ]. This pledge carried special weight during the time of Ezra and Nehemiah. Commentators explain that this was either a rabbinic requirement at the time or a voluntary decision by the people to offer a portion from all tree fruits, going beyond the basic biblical mandates of grain, wine, and oil [מלבי״ם].
These offerings were brought directly to the chambers of the House of God. This location was chosen because the priests regularly resided in these rooms [רש״י]. Storing the produce there allowed the priests to easily and fairly divide the gifts among themselves [מצודת דוד].
The commitment then shifts to the Levites, who received the first tithe from everything that grew in the ground [מלבי״ם, ביאור שטיינזלץ]. The commentators agree that the Levites themselves acted as the collectors, traveling to gather their portions in all the agricultural towns where the people worked the fields [רש״י, מלבי״ם]. This arrangement highlights a deep moral message. Even though the people invested immense physical labor to plow, plant, and harvest the land, they remained faithful to their promise, willingly handing over a portion of their hard-earned produce to the Levites who had not toiled in the soil [מצודת דוד].