4הָרִאשׁוֹן וְהַשֵּׁנִי וְהַשְּׁלִישִׁי בַּקֹּדֶשׁ טְמֵאִין וּמְטַמְּאִין. הָרְבִיעִי פָּסוּל וְאֵינוֹ מְטַמֵּא וְאֵין רְבִיעִי עוֹשֶׂה חֲמִישִׁי לְעוֹלָם. וּמִנַּיִן לַשְּׁלִישִׁי בַּקֹּדֶשׁ שֶׁהוּא טָמֵא שֶׁנֶּאֱמַר (ויקרא ז יט) "וְהַבָּשָׂר אֲשֶׁר יִגַּע בְּכָל טָמֵא לֹא יֵאָכֵל" וּכְבָר קָרָא הַכָּתוּב לַשֵּׁנִי טָמֵא שֶׁנֶּאֱמַר (ויקרא יא לג) "כּל אֲשֶׁר בְּתוֹכוֹ יִטְמָא" הָא לָמַדְתָּ שֶׁבְּשַׂר הַקֹּדֶשׁ שֶׁנָּגַע בְּשֵׁנִי נִטְמָא וְיִשָּׂרֵף. וּמִנַּיִן לָרְבִיעִי בַּקֹּדֶשׁ שֶׁהוּא פָּסוּל מִקַּל וָחֹמֶר. וּמַה מְחֻסַּר כִּפּוּרִים שֶׁהוּא מֻתָּר בִּתְרוּמָה אָסוּר בְּקֹדֶשׁ עַד שֶׁיָּבִיא כַּפָּרָתוֹ. הַשְּׁלִישִׁי שֶׁהוּא פָּסוּל בִּתְרוּמָה אֵינוֹ דִּין שֶׁיַּעֲשֶׂה רְבִיעִי בְּקֹדֶשׁ. אֲבָל הַחֲמִישִׁי טָהוֹר:
With regard to consecrated food, primary, secondary, and tertiary derivatives contract impurity and impart impurity. A derivative to the fourth degree is disqualified, but does not impart impurity, for a derivative to the fourth degree does not ever create a derivative to the fifth degree. What is the source that teaches that a tertiary derivative is impure with regard to consecrated foods? Leviticus 7:19 states: "Meat that touches anything that is impure shall not be eaten." And Scripture has already referred to a secondary derivative of impurity as "impure," as stated: "Everything in its inner space contracts impurity." Thus one can conclude that consecrated meat that touches a secondary derivative contracts impurity and must be burnt. What is the source that teaches that a fourth degree derivative disqualifies consecrated foods? It is derived through an inference from a more lenient matter to a more stringent one: A person who is lacking atonement is permitted to partake of terumah, but is forbidden to partake of sacrificial food until he brings the offerings that secure atonement for him. If so, should not a tertiary derivative of impurity which disqualifies terumah cause a derivative to the fourth degree to become impure? Nevertheless, a fifth degree derivative is pure.