וָאַעֲלֶה֙ אֶת־שָׂרֵ֣י יְהוּדָ֔ה מֵעַ֖ל לַחוֹמָ֑ה וָאַעֲמִ֡ידָה שְׁתֵּ֣י תוֹדֹת֩ גְּדוֹלֹ֨ת וְתַהֲלֻכֹ֤ת לַיָּמִין֙ מֵעַ֣ל לַחוֹמָ֔ה לְשַׁ֖עַר הָאַשְׁפֹּֽת׃
Then I brought up the princes of Judah upon the wall, and appointed two great companies that gave thanks and went in procession: on the right hand upon the wall toward the dung gate;
Mishnah Shevuot
It is the same whether one [while impure] enters the Temple court or the addition to the Temple court, for additions are not made to the city [of Jerusalem], or to the Temple courts except by the king, prophet, Urim and Thummim, the Sanhedrin of seventy one, and with two [loaves] of thanksgiving, and with song. And the court walks in a procession, the two [loaves] of thanksgiving [being carried] after them, and all Israel [following] behind them. The inner one is eaten, and the outer one is burnt. And as to any addition that was made without all these he who enters it [while impure] is not liable.