Reference for Kelim 28:7
שָׁלֹשׁ עַל שָׁלֹשׁ שֶׁאָמְרוּ, חוּץ מִן הַמְּלָל, דִּבְרֵי רַבִּי שִׁמְעוֹן. וַחֲכָמִים אוֹמְרִים, שָׁלֹשׁ עַל שָׁלֹשׁ מְכֻוָּנֶת. טְלָיָהּ עַל הַבֶּגֶד, מֵרוּחַ אַחַת, אֵינוֹ חִבּוּר. מִשְּׁתֵּי רוּחוֹת זוֹ כְנֶגֶד זוֹ, חִבּוּר. עֲשָׂאוֹ כְמִין גַּאם, רַבִּי עֲקִיבָא מְטַמֵּא, וַחֲכָמִים מְטַהֲרִין. אָמַר רַבִּי יְהוּדָה, בַּמֶּה דְבָרִים אֲמוּרִים, בְּטַלִּית. אֲבָל בְּחָלוּק, מִלְמַעְלָן, חִבּוּר. וּמִלְּמַטָּן, אֵינוֹ חִבּוּר:
The [piece of fabric of] three by three [fingerbreadths] of which They spoke does not include the hem, according to Rabbi Shimon. And the Sages say: it is precisely three by three [including the hem]. If one patched it onto a garment on one side [only], it is not considered a connection [for the purposes of impurity]; if on two sides, one opposite the other, it is considered to be a connection. If one fashioned it like a gamma [in an L-shape], Rabbi Akiva considers it impure, and the Sages consider it pure. Rabbi Yehudah said, "With regard to what do these things apply? To a cloak. But regarding a robe, if [it was patched on] from above [the tear], it is considered a connection; and if from below [the tear], it is not considered a connection."