Reference for Zevachim 6:2
חַטַּאת הָעוֹף הָיְתָה נַעֲשֵׂית עַל קֶרֶן דְּרוֹמִית מַעֲרָבִית. בְּכָל מָקוֹם הָיְתָה כְשֵׁרָה, אֶלָּא זֶה הָיָה מְקוֹמָהּ. וּשְׁלשָׁה דְבָרִים הָיְתָה אוֹתָהּ הַקֶּרֶן מְשַׁמֶּשֶׁת מִלְּמַטָּן, וּשְׁלשָׁה מִלְמַעְלָן. מִלְּמַטָּן, חַטַּאת הָעוֹף וְהַהַגָּשׁוֹת וּשְׁיָרֵי הַדָּם. מִלְמַעְלָן, נִסּוּךְ הַמַּיִם וְהַיַּיִן וְעוֹלַת הָעוֹף כְּשֶׁהִיא רַבָּה בַמִּזְרָח:
The <i>Chattat</i> [offerings brought to expiate sin] of a bird was performed at the southwest corner [of the altar]. It is valid [if done] any place, but that was its [proper] place. That corner served [as the location for] three services below [the altar's midpoint] and it served [as the location for] three services above [the altar's midpoint]. [Performed at this corner] below [the midpoint were]: The <i>Chattat</i> of the bird, the presentation [of <i>Menachot</i>], and [the pouring out of] the remainders [of sacrificial] blood. [Performed at this corner] above [the midpoint were]: [The pouring of] the wine libation, [the pouring of the] water libation, and [the procedure of] the <i>Olah</i> [an offering that is entirely burnt] of a bird when there were too many [sacrifices being brought] at the east [corner of the altar].