טהרות ד׳Tahorot 4

Mishnah 3ג׳

הַשֶּׁרֶץ בְּפִי הַחֻלְדָּה, וְהַנְּבֵלָה בְּפִי הַכֶּלֶב, וְעָבְרוּ בֵין הַטְּהוֹרִים, אוֹ שֶׁעָבְרוּ טְהוֹרִים בֵּינֵיהֶן, סְפֵקָן טָהוֹר, מִפְּנֵי שֶׁאֵין לַטֻּמְאָה מָקוֹם. הָיוּ מְנַקְּרִין בָּהֶן עַל הָאָרֶץ וְאָמַר, הָלַכְתִּי לַמָּקוֹם הַלָּז וְאֵינִי יוֹדֵעַ אִם נָגַעְתִּי אִם לֹא נָגַעְתִּי, סְפֵקוֹ טָמֵא, מִפְּנֵי שֶׁיֵּשׁ לַטֻּמְאָה מָקוֹם:

If there is a vermin in the mouth of a weasel or an animal carcass in the mouth of a dog, and they passed among pure things, or pure things passed among them, their uncertainty is pure [i.e. their purity status is uncertain, and therefore pure], because the impurity has no [fixed] place. If they [the dog or weasel] were picking at them [the dead animals] on the ground, and someone says, "I went to that place, but I do not know if I touched [the vermin or the carcass] or I did not touch it, his uncertainly is impure [i.e. his purity status is uncertain, and therefore impure], because the impurity has a [fixed] place.

Mishnah 4ד׳

כַּזַּיִת מִן הַמֵּת בְּפִי הָעוֹרֵב, סָפֵק הֶאֱהִיל עַל הָאָדָם וְעַל הַכֵּלִים בִּרְשׁוּת הַיָּחִיד, סְפֵק אָדָם, טָמֵא, סְפֵק כֵּלִים, טָהוֹר. הַמְמַלֵּא בַעֲשָׂרָה דְלָיִים וְנִמְצָא שֶׁרֶץ בְּאַחַד מֵהֶן, הוּא טָמֵא וְכֻלָּן טְהוֹרִין. הַמְעָרֶה מִכְּלִי לִכְלִי וְנִמְצָא שֶׁרֶץ בַּתַּחְתּוֹן, הָעֶלְיוֹן טָהוֹר:

If there is an olive's volume of corpse in the mouth of a raven, and it is uncertain if it was in an enclosed space over a person or over vessels in a private domain [which would have rendered them impure], the person's uncertainly is impure [i.e. the purity status of the person is uncertain, and therefore impure]; the vessels' uncertainty is pure [i.e. their purity status is uncertain, and therefore pure]. If one is filling ten buckets [from a well] and a vermin is found in one of them, it [the bucket in which it was found] is impure, and they [the rest] are all pure. One who pours from one vessel to another and a vermin was found in the lower one, the upper one is pure.