17שָׁלֹשׁ אֲבָנִים שֶׁחִבְּרָן בְּטִיט וַעֲשָׂאָן שְׁתֵּי כִּירוֹת בֵּין שֶׁחִבְּרָן זוֹ לָזוֹ וְלֹא חִבְּרָן לַקַּרְקַע בֵּין שֶׁחִבְּרָן בַּקַּרְקַע וְלֹא חִבְּרָן זוֹ לָזוֹ אִם נִטְמֵאת אַחַת מִשְּׁתֵי הַכִּירוֹת הָאֶבֶן הָאֶמְצָעִית הַמְשַׁמֵּשׁ מִמֶּנָּה לַכִּירָה הַטְּמֵאָה טָמֵא וְהַמְשַׁמֵּשׁ מִמֶּנָּה לַכִּירָה הַטְּהוֹרָה טָהוֹר. נִטְּלָה הָאֶבֶן הַחִיצוֹנָה שֶׁל כִּירָה הַטְּהוֹרָה הֻחְלְטָה הָאֶמְצָעִית כֻּלָּהּ לְטֻמְאָה. נִטְּלָה הַחִיצוֹנָה שֶׁל כִּירָה הַטְּמֵאָה טָהֲרָה הָאֶבֶן הָאֶמְצָעִית כֻּלָּהּ. נִטְמְאוּ שְׁתֵּי הַחִיצוֹנוֹת אִם הָיְתָה הָאֶבֶן הָאֶמְצָעִית גְּדוֹלָה נוֹתֵן מִמֶּנָּה לְכִירָה זוֹ כְּדֵי שְׁפִיתָה מִצִּדָּהּ וְלַכִּירָה הַשְּׁנִיָּה כְּדֵי שְׁפִיתָה מִכָּאן וְהַשְּׁאָר טָהוֹר. וְאִם הָיְתָה קְטַנָּה הַכּל טָמֵא. נִטְּלָה הָאֶמְצָעִית אִם יָכוֹל לִשְׁפּוֹת עַל שְׁתַּיִם חִיצוֹנוֹת יוֹרָה גְּדוֹלָה הֲרֵי הִיא טְמֵאָה. הָיוּ מְרֻחָקִין יֶתֶר מִזֶּה טְהוֹרָה. הֶחֱזִיר אֶת הָאֶמְצָעִית הֲרֵי הַכּל טָהוֹר כְּשֶׁהָיָה. מֵרְחָהּ בְּטִיט מְקַבֵּל טֻמְאָה מִכָּאן וּלְהַבָּא וְהוּא שֶׁיַּסִּיקֶנָּה לְכָל אַחַת מֵהֶן כְּדֵי לְבַשֵּׁל עָלֶיהָ אֶת הַבֵּיצָה:
The following rules apply when there are three stones that were connected with clay and were made into two ranges, whether they were connected to each other and not connected to the ground or connected to the ground and not connected to each other. If one of the two ranges contracts impurity, the portion of the middle stone which serves the impure range contracts impurity. The portion which serves the pure range, by contrast, remains] pure. If one removed the outer stone of the pure range, the middle stone has been definitively classified and is impure in its entirety. If the outer stone of the impure range is removed, the middle stone is purified in its entirety. The following rules apply if both ranges contracted impurity. If the middle stone is large, one allocates a portion large enough for a pot to be placed down on it on one side for one range and a portion large enough for a pot to be placed down on it on the other side for the other range, but the remainder of the stone is pure. If it was small, everything contracts impurity. If the middle stone was removed, different laws apply: If a large pot can be placed down on the two outer ones, the range is impure. If they are further apart, the range is pure. If one returned the middle stone, everything is pure as it was. If one coated it with clay, it is susceptible to ritual impurity in the future, provided one heats each of them sufficiently to cook an egg.