Letting the Herd Count Itself

How the Torah's restriction on inspecting the animal tithe prevents the owner from controlling which beast becomes holy.

לֹ֧א יְבַקֵּ֛ר בֵּֽין־ט֥וֹב לָרַ֖ע וְלֹ֣א יְמִירֶ֑נּוּ וְאִם־הָמֵ֣ר יְמִירֶ֔נּוּ וְהָֽיָה־ה֧וּא וּתְמוּרָת֛וֹ יִֽהְיֶה־קֹּ֖דֶשׁ לֹ֥א יִגָּאֵֽל׃

One must not look out for good as against bad, or make substitution for it. If one does make substitution for it, then it and its substitute shall both be holy: it cannot be redeemed. (Leviticus 27:33)

The Plain Reading of the Verse

In the final chapter of Leviticus, the Torah concludes the laws of מעשר בהמה (animal tithe). Every tenth animal passing under the counting rod becomes sacred to God. The Torah commands: 'He shall not search whether it be good or bad, and he shall not substitute for it'.

On a peshat (plain meaning) level, this prevents human tampering with the selection process. Ibn Ezra explains that the word יבקר (yavakker) means to separate or distinguish between items. Ralbag writes that even if the tenth animal happens to be blemished or lean, the owner must not wait for a robust animal to emerge in its place. The tenth animal itself must assume the sacred status, regardless of its physical condition.

Rashi notes that while other sacrifices demand the choicest specimens, animal tithe is unique. Sanctity falls upon the tenth animal whether it is unblemished or blemished. A blemished tithe cannot be offered on the altar, but it must still be eaten under the sacred restrictions of tithe.

לֹ֧א יְבַקֵּ֛ר בֵּֽין־ט֥וֹב לָרַ֖ע וְלֹ֣א יְמִירֶ֑נּוּ

One must not look out for good as against bad, or make substitution for it. (Leviticus 27:33)

The Gemara's Dilemma in Bekhorot

The Gemara in Bekhorot explores why an owner is trusted to testify about a blemish that appears on his animal. The Gemara suggests that the owner possesses legal credibility based on a prior alternative: had he wished to render the animal profane, he could have cast a blemish upon it earlier, before the tithe obligation took effect.

The Gemara immediately questions this premise. When the flock is driven through the narrow opening for counting, does the owner know beforehand which individual animal will emerge as the tenth? Because the emergence appears random, the owner could not have targeted that specific animal in advance.

מִי יָדַע הֵי נָפֵיק?

Does he know which of them will emerge? (Bekhorot 36b:14)

Steering the Tenth Animal

To salvage the argument, the Gemara suggests that the owner could have taken control of the lineup. Perhaps he could deliberately direct a chosen animal to exit as the tenth in line. Rashi explains that the phrase בריש עשרה ('at the head of ten') means positioning the animal specifically to emerge as the tenth.

If an owner possessed the legal right to steer the herd, he could deliberately consecrate any individual animal he chose. Under that premise, he would indeed retain the power to blemish that specific animal before initiating the count.

The Derashah: Unprompted Passage

The Gemara rejects this maneuver entirely by citing our verse: 'He shall not search whether it be good or bad'. The sages derive from this prohibition that the owner is barred from any form of sorting or orchestrating during the tithing process.

The animals must exit of their own accord. An owner may not guide, push, or arrange the animals to ensure that a favored or disfavored animal hits the tenth spot. As Malbim observes, entering the pen and manually selecting the finest animal invalidates the tithe entirely, because the Torah demands the tenth beast specifically.

Since the owner cannot steer a specific animal to emerge tenth, the Gemara must revise its explanation of his credibility. His legal power lay in a far more drastic option: had he wished, he could have inflicted a blemish upon his entire herd before beginning the count.

וְכִי תֵּימָא מַפֵּיק לֵיהּ בְּרֵישׁ עַשְׂרָה, ״לֹא יְבַקֵּר בֵּין טוֹב לָרַע״ אָמַר רַחֲמָנָא!

And if you would say that he intentionally leads an animal out as the head of the ten, 'He shall not search whether it be good or bad' states the Merciful One! (Bekhorot 36b:15)

The Resulting Halacha

The derashah transforms our understanding of the verse. In its literal setting, 'he shall not search' instructs the owner to accept whichever animal is counted, without exchanging an inferior beast for a superior one.

Through the eyes of the Gemara, the prohibition extends to the counting mechanism itself. The owner is forbidden from manipulating the passage of the flock. Divine sanctity in מעשר בהמה rests on an unmanipulated sequence, ensuring that human intention plays no role in choosing which animal is designated for God.

The animal tithe must emerge naturally without human steering, because the Torah forbids any manipulation of which beast becomes tenth.

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