Mishnah Machshirin 1:5: [If] one squeezes a leek or wrings [water] from his hair with his clothing, Rabbi Yose says: The [water] that emerges achieves BeKhi Yutan but what [remains] in it [that subsequently emerges] does not achieve BeKhi Yutan because he intends that all [the water] should emerge from it.

הַמְמַחֵק אֶת הַכְּרֵישָׁה, וְהַסּוֹחֵט שְׂעָרוֹ בִּכְסוּתוֹ, רַבִּי יוֹסֵי אוֹמֵר, הַיּוֹצְאִין בְּכִי יֻתַּן, וְאֶת שֶׁבּוֹ אֵינָן בְּכִי יֻתַּן, מִפְּנֵי שֶׁהוּא מִתְכַּוֵּן שֶׁיֵּצְאוּ מִכֻּלּוֹ:

Mishnah Machshirin 1:6: [If] one blows on lentils to check if they are good [ready to cook], Rabbi Shimon says: That [moisture from his breath] does not achieve BeKhi Yutan, but the Sages say: That does achieve BeKhi Yutan. [If] one eats sesame seeds with his finger, [regarding] the moisture on his hand [from his tongue], Rabbi Shimon says: That does not achieve BeKhi Yutan, but the Sages say: That does achieve BeKhi Yutan. [If] one hides his fruit in water because of thieves, that does not achieve BeKhi Yutan. It once happened that the people of Jerusalem hid their cakes of figs in water because of the Sikarii [bandits] and the Sages deemed them pure [that is, not susceptible to impurity]. [If] one places his fruit in the stream of a river to transport them with him, that does not achieve BeKhi Yutan.

הַנּוֹפֵחַ בַּעֲדָשִׁים לְבָדְקָן אִם יָפוֹת הֵן, רַבִּי שִׁמְעוֹן אוֹמֵר, אֵינָן בְּכִי יֻתַּן. וַחֲכָמִים אוֹמְרִים, בְּכִי יֻתַּן. וְהָאוֹכֵל שֻׁמְשְׁמִין בְּאֶצְבָּעוֹ, מַשְׁקִין שֶׁעַל יָדוֹ, רַבִּי שִׁמְעוֹן אוֹמֵר, אֵינָן בְּכִי יֻתַּן. וַחֲכָמִים אוֹמְרִים, בְּכִי יֻתַּן. הַטּוֹמֵן פֵּרוֹתָיו בַּמַּיִם מִפְּנֵי הַגַּנָּבִים, אֵינָן בְּכִי יֻתַּן. מַעֲשֶׂה בְאַנְשֵׁי יְרוּשָׁלַיִם שֶׁטָּמְנוּ דְבֵלָתָן בַּמַּיִם מִפְּנֵי הַסִּיקָרִין, וְטִהֲרוּ לָהֶן חֲכָמִים. הַנּוֹתֵן פֵּרוֹתָיו בְּשִׁבֹּלֶת הַנָּהָר לַהֲבִיאָן עִמּוֹ, אֵינָן בְּכִי יֻתַּן: