Reference for Kelim 29:2
שָׁלֹשׁ כְּסָתוֹת שֶׁל צֶמֶר, שֵׁשׁ שֶׁל פִּשְׁתָּן, שְׁלֹשָׁה סְדִינִין, שְׁתֵּים עֶשְׂרֵה מִטְפָּחוֹת, שְׁנֵי סוּבְרִיקִין, חָלוּק אֶחָד, טַלִּית אֶחָד, קְלֻבְקָרִין אֶחָד, חִבּוּר לַטֻּמְאָה וְלַהֲזָּיָה. יָתֵר מִכָּאן, חִבּוּר לַטֻּמְאָה, וְאֵין חִבּוּר לַהַזָּיָה. רַבִּי יוֹסֵי אוֹמֵר, אַף לֹא לַטֻּמְאָה:
Three woolen covers [stitched together, i.e. in order to keep track of them], six of linen, three sheets, twelve handkerchiefs, two pant-sleeves, one robe, one cloak, or one thick wool garment, are considered connected with regard to impurity and with regard to sprinkling [the waters of the red heifer, as part of the purification ritual]. If more than these [are sewn together], they are considered connected with regard to impurity, but they are not considered connected with regard to sprinkling. Rabbi Yose says: not even with regard to impurity.