במדבר, פרק י״ח, פסוק כ״ח

The chain of giving and holiness within the Israelites does not stop with the Levites. After receiving their tithes from the nation, the Levites carry the responsibility to become givers themselves, separating a portion of what they received for the Priests. The primary approach among commentators is that just as the Israelites separate an offering from the grain of their fields and the wine of their vineyards, the Levites must separate a portion from their own tithes, as this collected produce is considered their personal inheritance [רש״י, חזקוני, גור אריה, ביאור שטיינזלץ].

The framework of this command establishes a fundamental legal foundation for the concept of agency. It teaches that an appointed messenger acts with the full legal power of the one who sent them. Because the sender is bound by God's commandments, the agent must similarly be bound by them, which excludes non-Jews from serving as legal agents in these matters [תורה תמימה, תיבת גמא, רש״ר הירש, בכור שור]. [רש״ר הירש] adds a conceptual layer to this, suggesting that the Levite is essentially acting as the Israelite's agent to finalize the transfer of the sacred portion to the Priest. The inclusive nature of the command also reveals that the Priests themselves are not exempt from tithing; they too must separate offerings from their own personal produce [תורה תמימה, מלבי״ם]. Conversely, precise phrasing limits certain obligations, excluding partners, guardians, and sharecroppers from specific requirements of separation [תורה תמימה].

The obligation of this tithe is expansive, applying to all varieties of fruit [מלבי״ם, צפנת פענח]. It also draws a parallel between different categories of tithing, establishing that just as a minor is not obligated to separate a grain tithe, they are similarly exempt from an animal tithe [תורה תמימה]. However, there is a unique leniency regarding the Levite's specific contribution. While a standard offering must be taken from produce that is physically nearby, the Levite's portion can be separated even if the produce is scattered across entirely different locations [תורה תמימה, הכתב והקבלה]. Furthermore, because this portion is strictly defined as an offering to God, it lacks standard monetary status and therefore cannot be used as financial currency to betroth a woman [תורה תמימה].

The directive to present this sacred gift specifically to Aaron the Priest presents a profound historical mystery, as Aaron died in the wilderness and never entered the Land of Israel to receive these agricultural offerings. Several perspectives address this difficulty. One tradition views this as a hidden promise for the resurrection of the dead, indicating that Aaron will eventually return to life to accept these gifts from the nation [תורה תמימה, חתם סופר, העמק דבר]. Another approach views Aaron as an enduring moral and spiritual archetype. Just as Aaron was deeply connected to Torah and meticulous in his purity, these sacred gifts should only be given to a Priest who is a God-fearing Torah scholar, rather than one who is ignorant [תורה תמימה, רש״ר הירש, מלבי״ם]. Building on this theme of elevated sanctity, [העמק דבר] notes that because this specific offering is separated from produce that is already holy, it possesses a uniquely high status. Therefore, it is most fitting and honorable to present it to the High Priest, who serves in Aaron's direct stead. Finally, the emphasis on the priesthood reinforces the requirement of purity. The offering must be given to a Priest while he is in a state of ritual purity, teaching that one is strictly forbidden to defile the produce with their hands [תורה תמימה].