10עִסָּה שֶׁנּוֹלַד בָּהּ סְפֵק טֻמְאָה קֹדֶם שֶׁתִּתְגַּלְגֵּל יַעֲשֶׂנָּה בְּטֻמְאָה לְפִי שֶׁמֻּתָּר לְטַמֵּא חֻלִּין שֶׁבְּאֶרֶץ יִשְׂרָאֵל וְתִשָּׂרֵף חַלָּתָהּ. נוֹלַד לָהּ אַחַר שֶׁנִּתְגַּלְגְּלָה סְפֵק טֻמְאָה שֶׁוַּדָּאָהּ מְטַמֵּא אֶת הַחֻלִּין מִן הַתּוֹרָה יִגְמְרֶנָּה בְּטָהֳרָה. שֶׁכָּל שֶׁוַּדָּאָהּ מְטַמֵּא אֶת הַחֻלִּין גָּזְרוּ עַל סְפֵקוֹ בְּחֻלִּין הַטְּבוּלִים לְחַלָּה שֶׁלֹּא יְטַמְּאוּ אוֹתָן הוֹאִיל וְנִטְבְּלוּ לְחַלָּה. וְתִהְיֶה הַחַלָּה תְּלוּיָה לֹא נֶאֱכֶלֶת וְלֹא נִשְׂרֶפֶת:
When a question arises concerning the ritual purity of a dough before it was rolled together as a ball, he should prepare [the dough] in a state of ritual impurity. For it is permitted to make ordinary produce impure in Eretz Yisrael. The challah should then be burnt. If, after a dough was rolled into a ball, a doubtful situation arose concerning its ritual purity which, were it to be ascertained that it was definitely impure, would convey ritual impurity of Scriptural origin, its [preparation] should be completed in a state of ritual purity. [The rationale is that with regard to] any circumstance where impurity would be imparted to ordinary produce were one certain that it transpired, our Sages decreed that if there is a doubt that it transpired, a dough upon which the obligation to separate challah already fell should not intentionally be made impure, for that obligation has already taken effect. Instead, the challah [separated] is a tentative state; it is not eaten, nor is it burnt.