Mishnah Machshirin 4:8: [If] an [earthenware] pot that is full of water is put into a Mikveh and an Av HaTumah reached out his hand into it [the pot], it [the pot] is [thereby] impure. [If] one who had contact with impurities [that is, he had touched an Av HaTumah] it [the pot] is [remains] pure. And [if it were] any other liquid [in the pot], [they] are impure because the water [of the Mikvah] does not purify other the liquids.

קְדֵרָה שֶׁהִיא מְלֵאָה מַיִם וּנְתוּנָה לְתוֹךְ הַמִּקְוֶה וּפָשַׁט אַב הַטֻּמְאָה אֶת יָדוֹ לְתוֹכָהּ, טְמֵאָה. מַגַּע טֻמְאוֹת, טְהוֹרָה. וּשְׁאָר כָּל הַמַּשְׁקִין, טְמֵאִין, שֶׁאֵין הַמַּיִם מְטַהֲרִים אֶת שְׁאָר הַמַּשְׁקִין:

Mishnah Machshirin 4:9: [If] one filled [water] through an irrigation channel [the water] is impure [makes food susceptible to impurity] for up to three days [afterwards]. Rabbi Akiva says: If it dries up, it is immediately pure; and if it is not dried it is impure [makes food susceptible to impurity] for up to thirty days.

הַמְמַלֵּא בְקִילוֹן, עַד שְׁלשָׁה יָמִים, טְמֵאִין. רַבִּי עֲקִיבָא אוֹמֵר, אִם נִגְּבוּ, מִיָּד טְהוֹרִים. וְאִם לֹא נִגְּבוּ, אֲפִלּוּ עַד שְׁלשִׁים יוֹם, טְמֵאִים: