Biblical and Rabbinic Currency Standards

How the Talmud defines the value of biblical silver and rabbinic coins, establishing the standards for firstborn redemption, assault penalties, and judicial oaths.

The Augmented Sela and Pidyon Haben

The Torah requires a father to redeem his firstborn son (פדיון הבן - redemption of the firstborn) with five silver shekalim. Rava explains that the original biblical shekel equaled twenty silver ma'ot (גרות - gerah units), which amounted to three and one-third dinarim. However, the Sages exercised biblical authority to increase the value of the shekel by one-sixth, establishing the standard sela at twenty-four ma'ot, or four full dinarim. Because of this augmentation, five sela'im equal twenty augmented dinarim.

The Rambam codifies this expansion, stating that a sela is four dinarim, each containing six ma'ot. The Shulchan Arukh rules that a father must redeem his firstborn son with five sela'im, totaling one hundred and twenty ma'ot, which weigh thirty dirhams of refined silver. The Rema adds that in Ashkenazic communities, this biblical requirement was commonly assessed at approximately two Rhine gold coins.

עֶשְׂרִים גֵּרָה הַשֶּׁקֶל — לָמַדְנוּ לַשֶּׁקֶל שֶׁהוּא עֶשְׂרִים גֵּרָה, וּמִנַּיִן שֶׁאִם רָצָה לְהוֹסִיף יוֹסִיף? תַּלְמוּד לוֹמַר: ״יִהְיֶה״

'A shekel is twenty gerah'—we learned regarding the shekel that it is twenty gerah; and from where do we derive that if one wishes to increase it, he may increase? The verse states: 'shall be.' (Bekhorot 50a:6)

Tyrian Silver Versus Rabbinic Provincial Currency

The Gemara formulates an essential monetary rule: any fixed amount of silver prescribed by the Torah is calculated in Tyrian currency (כסף צורי), which is refined silver of full intrinsic weight. Conversely, fixed penalties instituted by the Sages are denominated in provincial currency (כסף מדינה), which contains only one-eighth pure silver. For instance, the rabbinic fine of one sela imposed on someone who strikes another person with an open hand is not a four-dinar Tyrian coin, but a provincial sela worth merely half a dinar of pure silver.

The Shulchan Arukh codifies this distinction for bodily injuries and indignities. Maran rules that the fixed rabbinic selaim collected as fines are calculated in provincial silver containing only one-eighth pure metal, which equals three silver ma'ot.

כׇּל כֶּסֶף קָצוּב הָאָמוּר בַּתּוֹרָה — כֶּסֶף צוֹרִי, וְשֶׁל דִּבְרֵיהֶם — כֶּסֶף מְדִינָה.

Every fixed sum of money stated in the Torah is Tyrian silver, and that of the Sages is provincial silver. (Bekhorot 50b:8)

Minimum Claim for a Biblical Oath

A defendant who admits to part of a claim (מודה במקצת הטענה) is required by biblical law to take a judicial oath. The Gemara asks why this oath is triggered by a denied claim of only two silver ma'ot, given that biblical silver normally denotes a Tyrian coin. The Gemara answers that the verse states "money or vessels" (כסף או כלים); just as vessels denotes at least two items, money here denotes two distinct silver coins, specifically two ma'ot.

The Shulchan Arukh rules that a defendant is obligated in a biblical oath only if the claimant demands at least two ma'ot and a peruta, and the defendant admits to a peruta while denying the rest. Maran defines this minimum denied claim of two ma'ot as weighing thirty-two barleycorns of pure silver.

ושיעור שתי מעין משקל ל"ב שעורים כסף נקי

And the measure of two ma'ot is the weight of thirty-two barleycorns of pure silver. (Shulchan Arukh, Choshen Mishpat 88:1)

Biblical monetary obligations demand full-weight Tyrian silver, whereas rabbinic fines are satisfied with provincial currency containing only one-eighth pure silver.

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