Jerusalem Talmud Shevuot 2:2

משנה: אֶחָד נִכְנַס לָעֲזָרָה וְאֶחָד נִכְנַס לְתוֹסֶפֶת הָעֲזָרָה שֶׁאֵין מוֹסִיפִין עַל הָעִיר וְעַל הָעֲזָרוֹת אֶלָּא כַמֶּלֶךְ וְנָבִיא וְאוּרִים וְתוּמִּים וּכְסַנְהֶדְרִין שֶׁל שִׁבְעִים וְאֶחָד וּכִשְׁתֵּי תוֹדוֹת וּבְשִׁיר וּבֵית דִּין מְהַלְּכִין וּשְׁתֵּי תוֹדוֹת אַחֲרֵיהֶן הַפְּנִימִית נֶאֱכֶלֶת וְהַחִיצוֹנָה נִשְׂרֶפֶת. וְכֹל שֶׁלֹּא נַעֲשָׂה בְכָל־אֵילּוּ הַנִּכְנָס לְשָׁם אֵין חַייָּבִין עָלֶיהָ׃ MISHNAH: Whether one entered the courtyard or the addition to the courtyard⁵²The biblical definition of “Sanctuary” as applied to the Temple Mount in Jerusalem applies only to the area sanctified by Solomon and his successors during the existence of the First Temple, and its reconstruction by Nehemiah. It excludes the additions to the Temple area and the Temple Mound made by Herod. Similarly, the city of Jerusalem which represents the Camp of the Israelites in the desert is only the First Temple city, with the area between the First Temple wall and the Damascus gate being of questionable sanctity., because one adds to the city and the temple courtyards only by King and Prophet, and Urim and Tummim, and the Synhedrion of Seventy-One, and two thanksgiving offerings, and song, with the Court walking and the two thanksgiving offerings after them. The inner one is eaten but the outer one is burned. Any [addition] which was not made with all these, one who was entering there is not liable for it⁵³There can be no liability to bring a variable sacrifice for entering the Herodian additions to the Temple Mount in a state of impurity..

הלכה: אֶחָד נִכְנַס לָעֲזָרָה כול׳. רַב אָמַר. בַּתְּחִילָּה. וַיַּ֤עַל דָּוִד֙ בִּדְבַר גָּ֔ד זֶה מֶלֶךְ וְנָבִיא. וַיָּ֣חֶל שְׁלֹמֹ֗ה לִבְנ֤וֹת אֶת־בֵּֽית־יי בִּירושָׁלִַם אֵילּוּ אוּרִים וְתוּמִּים. וְדָוִד אָבִ֑יהוּ זֶה סַנְהֶדְרִין שְׁאַ֤ל אָבִ֨יךָ֙ וְיַגֵּ֔דְךָ. שִׁיר וַיֵּ֤לֶךְ אַֽחֲרֵיהֶם֙ הֽוֹשַׁעְיָ֔ה וְשָׂרֵי. תּוֹדוֹת וָאַֽעֲמִ֡ידָה שְׁתֵּ֣י תוֹדֹוֹת וגו׳. אָמַר רִבִּי שְׁמוּאֶל בַּר רִבִּי יוּדָן. מַה כָּתֻב מְהַלְּכוֹת וְלֹא תַהֲלוּכוֹת. HALAKHAH: “Whether one entered the courtyard,” etc. ⁵⁴This Halakhah is a very truncated and inferior copy of parts of Sanhedrin 1:3:4" href="/Jerusalem_Talmud_Sanhedrin.1.3.4">Sanhedrin1:5 (Notes 288–294). The second paragraph is from the end of that Halakhah, Note 326. Its inclusion indicates that all of that Halakhah should be studied here. Rav said, at the start: ⁵⁵2S.24:19.David ascended following Gad’s word, that is King and Prophet. ⁵⁶2Chr. 3:1.Solomon started to build the Temple of the Eternal in Jerusalem, these are Urim and Tummim. ⁵⁶2Chr. 3:1.And his father David, this is the Synhedrion, ⁵⁷Deuteronomy.32.7">Deut. 32:7.ask your father and he will tell you. Song, after them went Hoshaia and the officers⁵⁸Nehemiah.12.32">Neh. 12:32.. Thanksgiving sacrifices, I put up two thanksgiving sacrifices⁵⁹Nehemiah.12.31">Neh. 12:31.. Rebbi Samuel bar Rebbi Yudan said, what is written, walking? No, being in procession.

מִפְּנֵי שֶׁהָֽיְתָה תּוֹרְפַת יְרושָׁלִַם שָׁם וְהָֽיְתָה יְכוֹלָה לְהִיכָּבֵשׁ מִשָּׁם. Because it was the vulnerable spot of Jerusalem; it could be conquered from there.”