Mishnayos Bava Metzia Perek 8 Mishnah 4

With regard to one who exchanges a cow for a donkey, such that by virtue of the cow owner’s act of acquisition on the donkey, the donkey’s erstwhile owner simultaneously acquires the cow, wherever it happens to be located, and afterward the cow is found to have calved; and similarly, with regard to one who sells his Canaanite maidservant, with the acquisition effected by the buyer giving him money, and afterward she is found to have given birth to a child, who will be a slave belonging to his mother’s master, at times it is uncertain whether the offspring was born before or after the transaction. If this seller says: The birth occurred before I sold the cow or maidservant, and so the offspring belongs to me, and that buyer says: The birth occurred after I purchased the cow or maidservant, and so the offspring belongs to me, they divide the value of the offspring between them. The mishna continues: There is a case of one who had two Canaanite slaves, one large, worth more on the slave market, and one small, worth less on the slave market, and similarly, one who had two fields, one large and one small. He sold one of them, and there was a dispute between the buyer and the seller concerning which one was sold. If the buyer says: I purchased the large one, and the other one, i.e., the seller, says: I do not know which I sold; the buyer is entitled to take the large one. If the seller says: I sold the small one, and the other one, i.e., the buyer, says: I do not know which one I purchased; the buyer is entitled to take only the small one. If this one says: The large one was sold, and that one says: The small one was sold, then the seller takes an oath that it was the small one that he sold, and then the buyer takes the small one. If this one says: I do not know which one was sold, and that one says: I do not know which one was sold, they divide the disputed amount between them.

הַמַּחֲלִיף פָּרָה בַּחֲמוֹר וְיָלְדָה, וְכֵן הַמּוֹכֵר שִׁפְחָתוֹ וְיָלְדָה, זֶה אוֹמֵר עַד שֶׁלֹּא מָכָרְתִּי, וְזֶה אוֹמֵר מִשֶּׁלָּקָחְתִּי, יַחֲלֹקוּ. הָיוּ לוֹ שְׁנֵי עֲבָדִים, אֶחָד גָּדוֹל וְאֶחָד קָטָן, וְכֵן שְׁתֵּי שָׂדוֹת, אַחַת גְּדוֹלָה וְאַחַת קְטַנָּה, הַלּוֹקֵחַ אוֹמֵר גָּדוֹל לָקַחְתִּי, וְהַלָּה אוֹמֵר אֵינִי יוֹדֵעַ, זָכָה בַגָּדוֹל. הַמּוֹכֵר אוֹמֵר קָטָן מָכָרְתִּי, וְהַלָּה אוֹמֵר אֵינִי יוֹדֵעַ, אֵין לוֹ אֶלָּא קָטָן. זֶה אוֹמֵר גָּדוֹל וְזֶה אוֹמֵר קָטָן, יִשָּׁבַע הַמּוֹכֵר שֶׁהַקָּטָן מָכָר. זֶה אוֹמֵר אֵינִי יוֹדֵעַ וְזֶה אוֹמֵר אֵינִי יוֹדֵעַ, יַחֲלֹקוּ: