טבול יום ד׳Tevul Yom 4

Mishnah 1א׳

אֹכֶל מַעֲשֵׂר שֶׁהֻכְשַׁר בְּמַשְׁקֶה, וְנָגַע בּוֹ טְבוּל יוֹם אוֹ יָדַיִם מְסֹאָבוֹת, מַפְרִישִׁין מִמֶּנּוּ תְרוּמַת מַעֲשֵׂר בְּטָהֳרָה, מִפְּנֵי שֶׁהוּא שְׁלִישִׁי, וְהַשְּׁלִישִׁי טָהוֹר לְחֻלִּין:

Regarding food taken as the [first] tithe, which was primed for impurity by a liquid, if it was then touched by a tevul yom [one who has immersed that day in a mikvah, but who must wait until nightfall to become fully pure, and is of a second degree impurity until then] or by one with soiled [i.e. impure] hands, terumat ma'aser [a tenth of the tithe given to a Levi which must, in turn , be given to a kohen and which becomes holy upon separation, and can only be consumed by kohanim or their household] may be separated from it in purity, because it is of a third degree [level of impurity], and something of a third degree is pure with regard to chullin [produce or food that is not sanctified, and is permitted for general consumption].

Mishnah 2ב׳

הָאִשָּׁה שֶׁהִיא טְבוּלַת יוֹם, לָשָׁה אֶת הָעִסָּה, וְקוֹצָה לָהּ חַלָּה וּמַפְרַשְׁתָּהּ, וּמַנַּחְתָּהּ בִּכְפִישָׁה מִצְרִית אוֹ בִנְחוּתָא, וּמַקֶּפֶת וְקוֹרָא לָהּ שֵׁם, מִפְּנֵי שֶׁהִיא שְׁלִישִׁי, וְהַשְּׁלִישִׁי טָהוֹר לְחֻלִּין:

A woman who is a tevulat yom may knead dough, cut off a portion for challah, and separate it, and place it in a basket of twigs or on a tray, and then bring it near [to the rest of the dough] and call it a name [i.e. declare it to be challah]; because it is of a third degree [impurity], and something of a third degree is pure with regard to chullin.