The Mishnah
שקלים ו׳Shekalim 6
Perek 6 of 8 in Shekalim — 6 mishnayot
Mishnah 1א׳
שְׁלֹשָׁה עָשָׂר שׁוֹפָרוֹת, שְׁלֹשָׁה עָשָׂר שֻׁלְחָנוֹת, שְׁלשׁ עֶשְׂרֵה הִשְׁתַּחֲוָיוֹת, הָיוּ בַּמִקְדָּשׁ. שֶׁל בֵּית רַבָּן גַּמְלִיאֵל וְשֶׁל בֵּית רַבִּי חֲנַנְיָא סְגַן הַכֹּהֲנִים הָיוּ מִשְׁתַּחֲוִין אַרְבַּע עֶשְׂרֵה. וְהֵיכָן הָיְתָה יְתֵרָה, כְּנֶגֶד דִּיר הָעֵצִים, שֶׁכֵּן מָסֹרֶת בְּיָדָם מֵאֲבוֹתֵיהֶם שֶׁשָּׁם הָאָרוֹן נִגְנַז:
There were thirteen shofarot [horn-shaped collection chests], thirteen tables, and thirteen places of prostration in the Temple. The house of Rabban Gamliel and the house of Rabbi Chanania, deputy of the priests, used to prostrate themselves in fourteen places. And where was this additional place of prostration? Opposite the wood storage chamber, for they had a tradition from their ancestors that the Ark was hidden there.
Mishnah 2ב׳
מַעֲשֶׂה בְּכֹהֵן אֶחָד שֶׁהָיָה מִתְעַסֵּק, וְרָאָה הָרִצְפָּה שֶׁהִיא מְשֻׁנָּה מֵחֲבֵרוֹתֶיהָ. בָּא וְאָמַר לַחֲבֵרוֹ. לֹא הִסְפִּיק לִגְמֹר אֶת הַדָּבָר עַד שֶׁיָּצְתָה נִשְׁמָתוֹ, וְיָדְעוּ בְיִחוּד שֶׁשָּׁם הָאָרוֹן נִגְנַז:
It once happened that a priest was preoccupied, and he saw that the [part of the] floor was different from its neighbors. He came and told his fellow. He did not finish telling his fellow before he died, and they knew for certain that the Ark was hidden there.
Mishnah, Torat Emet 357 edition, via Sefaria — public domain
English: Sefaria Community Translation — CC0