שְׁתֵּי עִסּוֹת שֶׁיֵּשׁ בִּשְׁתֵּיהֶן שִׁעוּר הַחַיָּב בְּחַלָּה וְאֵין בְּאַחַת מֵהֶן כַּשִּׁעוּר וְנָגְעוּ זוֹ בְּזוֹ וְנָשְׁכוּ זוֹ אֶת זוֹ אִם הָיוּ שֶׁל שְׁנַיִם אֲפִלּוּ הֵן מִמִּין אֶחָד פְּטוּרִין מִן הַחַלָּה. שֶׁסְּתָם שְׁנַיִם מַקְפִּידִין. וְאִם יָדוּעַ שֶׁאֵינָן מַקְפִּידִין עַל עֵרוּב הָעִסּוֹת הֲרֵי אֵלּוּ מִצְטָרְפוֹת:
[The following laws apply when] there are two doughs that when combined comprise the measure that obligates the separation of challah, but neither comprises that measure alone should they touch each other and become attached to each other. If they belong to two individuals, they are exempt from challah even though they are of the same type of grain. [The rationale is that] we assume that the two people object [to the combination of their doughs]. If it is known that they would not object to the combination of their doughs, they are considered as one.
