Mishnayos Gittin Perek 5 Mishnah 6

The law of Sicarii [Sikarikon] did not apply in Judea in the time that people were being killed in the war. From the time that people were being killed in the war and onward, the law of Sicarii did apply there. What is this law of Sicarii? If one first purchased land from a Sicarius, who extorted the field from its prior owners with threats, and afterward the buyer returned and purchased the same field a second time from the prior landowner, his purchase is void. The prior owner of the field can say that he did not actually mean to sell him the field. By contrast, if he first acquired the field from the prior owner and afterward he returned and purchased the same field from a Sicarius, his purchase stands. Similarly, if one first purchased from the husband the rights to use a field belonging to his wife, and afterward he returned and purchased the same field from the wife, so that if the husband were to predecease or divorce her, the purchaser would then own it fully, his purchase is void. The woman can claim that she did not wish to quarrel with her husband and to object to the transaction but that in truth she did not agree to the sale. By contrast, if he first acquired the field from the wife, and afterward he returned and purchased the same field from the husband, his purchase stands. This is the initial version of this mishna. Later, the court of those who came after the Sages who composed that mishna said: With regard to one who purchased a field from a Sicarius, he must give the prior owner one-fourth of the field’s value. When does this apply? At a time when the prior owner is unable to purchase the field himself. But if he is able to purchase it himself, he precedes anyone else. Rabbi Yehuda HaNasi later convened a court, and they counted their votes and determined that if the field remained before, i.e., in the possession of, the Sicarius for twelve months, whoever first purchases the field acquires possession of it, but he must give the prior owner one-fourth of the field’s value.

לֹא הָיָה סִיקָרִיקוֹן בִּיהוּדָה בַהֲרוּגֵי מִלְחָמָה. מֵהֲרוּגֵי מִלְחָמָה וְאֵילָךְ, יֶשׁ בָּהּ סִיקָרִיקוֹן. כֵּיצַד. לָקַח מִסִּיקָרִיקוֹן וְחָזַר וְלָקַח מִבַּעַל הַבַּיִת, מִקָּחוֹ בָטֵל. מִבַּעַל הַבַּיִת וְחָזַר וְלָקַח מִסִּיקָרִיקוֹן, מִקָּחוֹ קַיָּם. לָקַח מִן הָאִישׁ וְחָזַר וְלָקַח מִן הָאִשָּׁה, מִקָּחוֹ בָטֵל. מִן הָאִשָּׁה וְחָזַר וְלָקַח מִן הָאִישׁ, מִקָּחוֹ קַיָּם. זוֹ מִשְׁנָה רִאשׁוֹנָה. בֵּית דִּין שֶׁל אַחֲרֵיהֶם אָמְרוּ, הַלּוֹקֵחַ מִסִּיקָרִיקוֹן נוֹתֵן לַבְּעָלִים רְבִיעַ. אֵימָתַי, בִּזְמַן שֶׁאֵין בְּיָדָן לִקַּח. אֲבָל יֵשׁ בְּיָדָן לִקַּח, הֵן קוֹדְמִין לְכָל אָדָם. רַבִּי הוֹשִׁיב בֵּית דִּין וְנִמְנוּ, שֶׁאִם שָׁהֲתָה בִפְנֵי סִיקָרִיקוֹן שְׁנֵים עָשָׂר חֹדֶשׁ, כָּל הַקּוֹדֵם לִקַּח, זוֹכֶה, אֲבָל נוֹתֵן לַבְּעָלִים רְבִיעַ: