Passing Under the Rod Before Its Time

How a verbal analogy links the animal tithe to the firstborn, allowing newborn animals to be sanctified.

וְכׇל־מַעְשַׂ֤ר בָּקָר֙ וָצֹ֔אן כֹּ֥ל אֲשֶׁר־יַעֲבֹ֖ר תַּ֣חַת הַשָּׁ֑בֶט הָֽעֲשִׂירִ֕י יִֽהְיֶה־קֹּ֖דֶשׁ לַֽיהֹוָֽה׃

All tithes of the herd or flock—of all that passes under the shepherd’s staff, every tenth one—shall be holy to GOD. (Leviticus 27:32)

The Setting and Plain Meaning

In the final chapter of Leviticus, the Torah commands the annual obligation to tithe domesticated herds and flocks. Every tenth animal born in a given year is set aside as an offering to God.

In its plain sense, the verse describes the physical procedure of counting the herd. The owner gathers the flock into an enclosure and allows them to exit single file through a narrow gate. As each animal passes, the owner marks every tenth one with red dye, designating it as consecrated. This simple phrase describes the animal as it passes under the rod during counting.

כֹּ֥ל אֲשֶׁר־יַעֲבֹ֖ר תַּ֣חַת הַשָּׁ֑בֶט הָֽעֲשִׂירִ֕י יִֽהְיֶה־קֹּ֖דֶשׁ לַֽיהֹוָֽה׃

Of all that passes under the shepherd's staff, every tenth one shall be holy to God. (Leviticus 27:32)

The Dilemma of the Newborn

The Gemara in Bekhorot examines a fundamental limitation of sacrificial animals. The Torah establishes that an animal under eight days of age—termed a mechussar zeman (an animal whose time has not yet arrived)—cannot be offered upon the altar.

The Tannaim dispute whether such an underage animal may be counted in the tithing pen alongside its mature peers. The first tanna excludes it, while Rabbi Shimon maintains that an animal under eight days old enters the pen to be tithed. Rabbi Shimon compares it to a firstborn (bekhor), which possesses intrinsic sanctity from birth even though it may only be sacrificed once it reaches eight days of age.

מְחוּסַּר זְמַן נִכְנָס לַדִּיר לְהִתְעַשֵּׂר, וַהֲרֵי הֵן כִּבְכוֹר

An animal whose time has not yet arrived enters the pen to be tithed, and they are like a firstborn. (Bekhorot 21b:1)

The Balance of Logical Claims

The Gemara challenges Rabbi Shimon’s comparison. Why should animal tithe follow the model of the firstborn rather than general consecrated sacrifices (kodashim), which cannot receive sanctity while underage?

The Gemara weighs four points favoring the firstborn against four points favoring general sacrifices,. While tithe and firstborn cannot be redeemed even if blemished, general sacrifices and tithes both apply to females, are not priestly gifts, and are sanctified by human action rather than holiness from the womb. Because these logical arguments deadlock, logic alone cannot decide the matter.

The Analogy of Passing

To resolve the deadlock, the Gemara reveals that Rabbi Shimon does not base his ruling on human reasoning. Instead, he applies an inherited verbal analogy known as a gezeirah shavah.

Rabbi Shimon links the shared root of ha'avarah (passing) appearing in both mitzvot. In Leviticus 27:32, the tithe is described as 'all that passes (ya'avor) under the rod'. In Exodus 13:12, the firstborn is designated with the words 'and you shall set apart [literally, cause to pass, ve-ha'avarta] all that opens the womb',. This textual link dictates that the tithe inherits the mechanics of the firstborn.

אֶלָּא רַבִּי שִׁמְעוֹן ״הַעֲבָרָה״ ״הַעֲבָרָה״ גְּמִיר.

Rather, Rabbi Shimon derives the halakha from a verbal analogy between the term 'passing' and 'passing.' (Bekhorot 21b:3)

The Halakhic Rule

Through this verbal analogy, Rabbi Shimon establishes that the tithe mirrors the firstborn in its sanctification timeline. A newborn animal under eight days of age can pass through the chute and be counted as the tenth animal.

Even though the young animal cannot yet be brought to the altar, sanctity takes effect beforehand. The animal becomes consecrated immediately upon exiting the pen, and the owner simply waits until it reaches its eighth day before offering it upon the altar.

Through a verbal analogy on the word 'passing', Rabbi Shimon learns that an animal under eight days old can enter the pen and receive the holiness of the tithe before it is fit for the altar.

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