Jerusalem Talmud Shevuot 6:3

משנה: לִטְרָא זָהָב לִי בְיָדֶךָ אֵין לְךָ בְיָדִי אֶלָּא לִטְרָא כֶסֶף פָּטוּר. דֵּינַר זָהָב לִי בְיָדֶךָ אֵין לְךָ בְיָדִי אֶלָּא דֵּינַר כֶּסֶף קטְרֵיסִית וּפוּנְדְּיוֹן וּפְרוּטָה חַייָב שֶׁהַכֹּל מִין מַטְבֵּעַ אֶחָד. MISHNAH: ⁵³Here starts the discussion of the condition that “the acknowledgment must be of the kind of the claim.”“You are holding for me a pound⁵⁴Greek λίτρα, a Roman libra of twelve (Troy) ounces. of gold,” “I am holding for you only a pound of silver;” he is not liable. “You are holding for me a gold denar,” “I am holding for you only a silver denar, or a tressis⁵⁵With the good Mishnah mss. (Kaufmann ms. and Maimonides’s autograph) read: וטריסית. Tressis“three as; something of little value.”., or a dupondius⁵⁶“Two as; two bits”., or a peruṭah,” he is liable since all kinds of coin⁵⁷Even if for a claim of a gold denar the defendant admits only a debt of one peruṭah, 1/4800, it is a valid admission which makes the defendant liable for an oath. are one.

הלכה: לִיטְרָא זָהָב לִי בְיָדֶךָ כול׳. שְׁמוֹנֶה שֶׁלְּזָהָב יֵשׁ לִי בַכִּיס. וְנִמְצְאוּ שְׁמוֹנֶה דֵינָרֵי זָהָב. אוֹ חֲמִשִּׁים סֶלַע. וְנִמְצְאוּ מָאתַיִם דֵּינָר. אוֹ מָאתַיִם דֵּינָר. וְנִמְצְאוּ חֲמִשִּׁים סֶלַע. הֲרֵי אֵילּוּ חוּלִין. שְׁמוֹנֶה דֵינָרֵי זָהָב יֵשׁ לִי בַכִּיס. וְנִמְצְאוּ חֲמִשִּׁים סֶלַע. אוֹ מָאתַיִם דֵּינָר. וְנִמְצְאוּ חֲמִשִּׁים סֶלַע. הֲרֵי אֵילּוּ שֵׁינִי. לִיטְרָא זָהָב לִי בְיָדֶךָ אֵין לְךָ בְיָדִי אֶלָּא לִיטְרָא כֶסֶף פָּטוּר. דֵּינָר זָהָב יֵשׁ לִי בְיָדֶךָ. אֵין לְךָ בְיָדִי אֶלָּא דֵּינָר כֶסֶף. אָמַר רִבִּי יַעֲקֹב בַּר אַבִּינָּא. בְּקַדְמִיתָא הֲוֵינָן אָֽמְרִין. דֵּינָר זָהָב פְּרוטְרוּט. דֵּינָרֵי זָהָב אֵינָן פְּרוטְרוּט. אִילּוּ מַר. דֵּינָרֵי זָהָב זָהוּב. יֵאוּת. אַשְׁכַּח תַּנֵּי. דֵּינָר זָהוּב זָהָב פָּטוּר. HALAKHAH: “You are holding for me a pound of gold,” etc. ⁵⁸Tosephta Ma`aser šeni5:5. In the opinion of S. Lieberman, the Tosephta is quoted here to indicate that the rules for Second Tithe and judicial oaths are different.
Second Tithe is the part of the harvest which the farmer should eat with his family at the place of the Sanctuary. If this is not practical, the crop can be redeemed and the sanctity transferred to the coins which then have to be spent in purity at the place of the Sanctuary. Problems arise when in the wallet chosen for the sanctified coins other coins are found which do not directly correspond to the farmer’s memory.“Eight of gold⁵⁹Gold coins, but seemingly different from the standard gold denar(or, after Diocletian’s currency reform, the solidus.) I have in the wallet and one finds there eight gold denarii; or fifty tetradrachmas and one finds 200 denar; or 200 denar and one finds 50 tetradrachmas; these are profane. Eight gold denarii I have in the wallet and one finds fifty tetradrachmas⁶⁰A gold denar usually is counted as 25 silver ii. 8 gold denarii are 200 silver denarii or 50 tetradrachmas.; or 200 denar and one finds 50 tetradrachmas, these are Second [Tithe].” “ ‘You are holding for me a pound of gold,’ ‘I am holding for you only a pound of silver;’ he is not liable. ‘You are holding for me a gold denar,’ ‘I am holding for you only a silver denar.’⁶¹This seems to be not a copy of the Mishnah but a text similar to Tosephta Ševuot5:8,9. The background text is from Tosephta 5:9: “‘You are holding for me a gold denar as gold coin,’ ‘I am holding for you only a silver denar, or a tressis, or a dupondius, or a peruṭah,’ he is liable.” The incomplete sentence in the Halakhah seems to be a text, not found in the Tosephta, “ ‘You are holding for me a gold denar,’ ‘I am holding for you only a silver denar,’ he is not liable.” The formulation of the text points to the first two Amoraic generations during the military anarchy in the Roman Empire, when the gold denar was a unit of accounting but not an actual coin. Then the status of a claim for a gold denar is similar to the claim for a pound of gold; if it is answered by an admission of silver units it is not an admission of the kind of the claim. But a claim for an actual gold coin which is answered by an admission of silver or bronze coins is an admission of the kind of the claim. In the rabbinic literature of the Middle Ages, זָהוּב is the name of the standard gold coin of the author’s country.” Rebbi Jacob bar Abinna said, earlier, we were saying, “a gold denar” is a detail; “gold denarii” are not detail. If he had said, “a gold denar, a gold coin” it would have been correct⁶²To hold the person liable who admits owing a silver denar when a gold coin was claimed.. It was found stated, “a gold coin of a denar,” he is not liable⁶³In the Tosephta: He is liable; the same in the Babli, 40a..