Mishnah Machshirin 2:11: [If] fruit of the second [year of the sabbatical cycle became mixed with and] exceeded that of third [year fruit], or [if] fruit of the third [year became mixed with and exceeded] that of fourth [year fruit], or [if] fruit of the fourth [year became mixed with and exceeded] that of fifth [year fruit], or [if] fruit of the fifth [year became mixed with and exceeded] that of sixth [year fruit], or [if] fruit of the sixth [year became mixed with and exceeded] that of seventh [year fruit], or [if] fruit of the seventh [year became mixed with and exceeded fruit] of the [year] following the seventh, we follow the majority. If it is half and half [we act] stringently.

פֵּרוֹת שְׁנִיָּה שֶׁרַבּוּ עַל שֶׁל שְׁלִישִׁית, וְשֶׁל שְׁלִישִׁית עַל שֶׁל רְבִיעִית, וְשֶׁל רְבִיעִית עַל שֶׁל חֲמִישִׁית, וְשֶׁל חֲמִישִׁית עַל שֶׁל שִׁשִּׁית, וְשֶׁל שִׁשִּׁית עַל שֶׁל שְׁבִיעִית, וְשֶׁל שְׁבִיעִית עַל שֶׁל מוֹצָאֵי שְׁבִיעִית, הוֹלְכִין אַחַר הָרֹב. מֶחֱצָה לְמֶחֱצָה, לְהַחֲמִיר:

Mishnah Machshirin 3:1: [If] a sack full of fruit is put on a riverbank, or on the edge of a cistern, or on the steps of a cave and it absorbs [moisture], whatever it absorbs achieves BeKhi Yutan [a state where liquid put upon food makes it susceptible to impurity]. Rabbi Yehudah says: Whatever is against the water achieves BeKhi Yutan, and whatever is not against the water does not achieve BeKhi Yutan.

שַׂק שֶׁהוּא מָלֵא פֵרוֹת וּנְתָנוֹ עַל גַּב הַנָּהָר, אוֹ עַל פִּי הַבּוֹר, אוֹ עַל מַעֲלוֹת הַמְּעָרָה, וְשָׁאֲבוּ, כֹּל שֶׁשָּׁאֲבוּ, בְּכִי יֻתַּן. רַבִּי יְהוּדָה אוֹמֵר, כֹּל שֶׁהוּא כְנֶגֶד הַמַּיִם, בְּכִי יֻתַּן. וְכֹל שֶׁאֵינוֹ כְנֶגֶד הַמַּיִם, אֵינוֹ בְּכִי יֻתַּן: