Reference for Middot 1:3
חֲמִשָּׁה שְׁעָרִים הָיוּ לְהַר הַבַּיִת. שְׁנֵי שַׁעֲרֵי חֻלְדָּה מִן הַדָּרוֹם, מְשַׁמְּשִׁין כְּנִיסָה וִיצִיאָה. קִיפוֹנוֹס מִן הַמַּעֲרָב, מְשַׁמֵּשׁ כְּנִיסָה וִיצִיאָה. טָדִי מִן הַצָּפוֹן, לֹא הָיָה מְשַׁמֵּשׁ כְּלוּם. שַׁעַר הַמִּזְרָחִי, עָלָיו שׁוּשַׁן הַבִּירָה צוּרָה, שֶׁבּוֹ כֹהֵן גָּדוֹל הַשּׂוֹרֵף אֶת הַפָּרָה וּפָרָה וְכָל מְסַעֲדֶיהָ יוֹצְאִים לְהַר הַמִּשְׁחָה:
There were five gates to the Temple Mount. [The] two Chulda gates in the south, used as entrance and as an exit. Kiponos in the west, used as an entrance and an exit. Tadi in the north, was not used at all. The Eastern Gate, was decorated with Shushan the capital [of Persia], and through it [the gate] the <i>Kohen Gadol</i> would burn the [red] heifer [for the purification ritual] and all those attending to it would exit to the Mount of Anointing [Mount of Olives].