Manna & Aaron's Staff
(לב) וַיֹּ֣אמֶר מֹשֶׁ֗ה זֶ֤ה הַדָּבָר֙ אֲשֶׁ֣ר צִוָּ֣ה יי מְלֹ֤א הָעֹ֙מֶר֙ מִמֶּ֔נּוּ לְמִשְׁמֶ֖רֶת לְדֹרֹתֵיכֶ֑ם לְמַ֣עַן ׀ יִרְא֣וּ אֶת־הַלֶּ֗חֶם אֲשֶׁ֨ר הֶאֱכַ֤לְתִּי אֶתְכֶם֙ בַּמִּדְבָּ֔ר בְּהוֹצִיאִ֥י אֶתְכֶ֖ם מֵאֶ֥רֶץ מִצְרָֽיִם׃ (לג) וַיֹּ֨אמֶר מֹשֶׁ֜ה אֶֽל־אַהֲרֹ֗ן קַ֚ח צִנְצֶ֣נֶת אַחַ֔ת וְתֶן־שָׁ֥מָּה מְלֹֽא־הָעֹ֖מֶר מָ֑ן וְהַנַּ֤ח אֹתוֹ֙ לִפְנֵ֣י יי לְמִשְׁמֶ֖רֶת לְדֹרֹתֵיכֶֽם׃ (לד) כַּאֲשֶׁ֛ר צִוָּ֥ה יי אֶל־מֹשֶׁ֑ה וַיַּנִּיחֵ֧הוּ אַהֲרֹ֛ן לִפְנֵ֥י הָעֵדֻ֖ת לְמִשְׁמָֽרֶת׃
(32) Moses said, “This is what the LORD has commanded: Let one omer of it be kept throughout the ages, in order that they may see the bread that I fed you in the wilderness when I brought you out from the land of Egypt.” (33) And Moses said to Aaron, “Take a jar, put one omer of manna in it, and place it before the LORD, to be kept throughout the ages.” (34) As the LORD had commanded Moses, Aaron placed it before the Pact, to be kept.
(א) למשמרת. לִגְנִיזָה: (ב) לדרתיכם. בִּימֵי יִרְמְיָהוּ; כְּשֶׁהָיָה יִרְמְיָהוּ מוֹכִיחָם לָמָה אֵין אַתֶּם עֹסְקִים בַּתּוֹרָה? וְהֵם אוֹמְרִים נַנִּיחַ מְלַאכְתֵּנוּ וְנַעֲסוֹק בַּתּוֹרָה, מֵהֵיכָן נִתְפַּרְנֵס?! הוֹצִיא לָהֶם צִנְצֶנֶת הַמָּן אָמַר לָהֶם אַתֶּם רְאוּ דְּבַר יי, שִׁמְעוּ לא נֶאֱמַר אֶלָּא רְאוּ, בָּזֶה נִתְפַּרְנְסוּ אֲבוֹתֵיכֶם, הַרְבֵּה שְׁלוּחִין יֵשׁ לוֹ לַמָּקוֹם לְהָכִין מָזוֹן לִירֵאָיו:

(1) למשמרת means to put by. (2) לדרתיכם FOR YOUR GENERATIONS e. g., in the days of Jeremiah: when Jeremiah was rebuking them (the people), saying, “Why do you not engage yourselves with the Torah?”, and they answered him, “Shall we leave our work and engage ourselves with the Torah? From where shall we earn a living?”, he brought out to them the jar of Manna and said to them, (Jeremiah 2:31) “[O Generation], see ye the thing of the Lord!” It is not said “Hear the word” but “See the thing”! — This thing is what your fathers were fed with. The Omnipresent God has many messengers (many means) to provide food for those who fear Him (Mekhilta d'Rabbi Yishmael 16:33).

שאת משוקדים מחר ארור וקם והתניא הוא יוסף איש הוצל הוא יוסף הבבלי הוא איסי בן יהודה הוא איסי בן גור אריה הוא איסי בן גמליאל הוא איסי בן מהללאל ומה שמו איסי בן עקיבא שמו בדאורייתא ליכא בדנביאי איכא ובדאורייתא ליכא והא איכא דבעי רב חסדא (שמות כד, ה) וישלח את נערי בני ישראל ויעלו עולות כבשים ויזבחו זבחים שלמים פרים או דילמא אידי ואידי פרים לרב חסדא מספקא ליה לאיסי בן יהודה פשיטא ליה מתני׳ החיצונה היתה פרופה מן הדרום ופנימית מן הצפון מהלך ביניהן עד שמגיע לצפון הגיע לצפון הופך פניו לדרום מהלך לשמאלו עם הפרוכת עד שהוא מגיע לארון הגיע לארון נותן את המחתה בין שני הבדים צבר את הקטרת על גבי גחלים ונתמלא כל הבית כולו עשן יצא ובא לו בדרך בית כניסתו ומתפלל תפלה קצרה בבית החיצון ולא היה מאריך בתפלתו שלא להבעית את ישראל גמ׳ במאי עסקינן אילימא במקדש ראשון מי הוו פרוכת אלא במקדש שני מי הוה ארון והתניא משנגנז ארון נגנזה עמו צנצנת המן וצלוחית שמן המשחה ומקלו של אהרן ושקדיה ופרחיה וארגז ששגרו פלשתים דורון לאלקי ישראל שנאמר (שמואל א ו, ח) וכלי הזהב אשר השיבותם לו אשם תשימו בארגז מצדו ושלחתם אותו והלך ומי גנזו יאשיהו גנזו מה ראה שגנזו ראה שכתוב (דברים כח, לו) יולך יי אותך ואת מלכך אשר תקים עליך עמד וגנזו שנאמר (דברי הימים ב לה, ג) ויאמר ללוים המבינים לכל ישראל הקדושים ליי תנו את ארון הקודש בבית אשר בנה שלמה בן דוד מלך ישראל אין לכם משא בכתף עתה עבדו את יי אלקיכם ואת עמו ישראל ואמר ר' אלעזר אתיא שמה שמה ואתיא דורות דורות ואתיא משמרת משמרת לעולם במקדש שני ומאי הגיע לארון מקום ארון והא קתני נתן את המחתה לבין שני הבדים אימא כבין שני הבדים צבר את הקטרת על גבי גחלים תנן כמאן דאמר צוברה תני חדא צוברה פנימה שהיא חוצה לו ותניא אידך צוברה חוצה שהיא פנימה לו אמר אביי תנאי היא ואמר אביי מסתברא כמאן דאמר פנימה שהיא חוצה לו דתנן מלמדין אותו הזהר

MISHNA: The outer curtain between the Sanctuary and the Holy of Holies was hooked [perufa] slightly open on the south side of the Sanctuary, and the inner curtain hooked slightly open on the north side of the Sanctuary, and therefore the High Priest could not enter the Holy of Holies directly. Rather, he enters through the southern opening and walks between the curtains until he reaches the opening to the north. When he reaches the opening to the north, he enters the Holy of Holies through that opening, turns his face to the south, and walks to his left along the curtain until he reaches the area before the Ark. When he reaches the Ark, he places the coal pan between the two staves. He piles the incense atop the coals, and the whole chamber in its entirety would fill with smoke. He then exits and comes out the way that he entered. He does not turn around but leaves the Holy of Holies walking while facing the Ark. And he recites a brief prayer in the outer chamber, in the Sanctuary. And he would not extend his prayer there so as not to alarm the Jewish people, who would otherwise conclude that something happened and that he died in the Holy of Holies. GEMARA: The Gemara asks: With what are we dealing here? To which time period is the mishna referring? If we say it is speaking about the First Temple, were there curtains then? There was only one curtain over the one-cubit partition. Rather, if we say that the mishna is dealing with the Second Temple, was there an Ark there? The Gemara elaborates: But wasn’t it taught in a baraita that when the Ark was buried, along with it was buried the jar of manna that was next to it, and the flask of oil used for anointing, and Aaron’s staff with its almonds and blossoms, and the chest that the Philistines sent as a gift [doron] to the God of Israel after they captured the Ark and were stricken by several plagues, as it is stated: “And put the jewels of gold that you return to Him for a guilt-offering, in a coffer by its side, and send it away that it may go” (I Samuel 6:8)? § And who buried the Ark? Josiah, king of Judea, buried it. And what did he see that he decided to bury it? He saw that it is written: “The Lord will bring you, and your king whom you shall set over you, to a nation that you have not known” (Deuteronomy 28:36). Since he knew that the Jewish people would ultimately be exiled, he felt it was better that the Ark should not be disgraced in exile, and therefore he arose and buried it. The Gemara cites the source for the tradition that Josiah buried the Ark. As it is stated: “And he said to the Levites who taught all of Israel, who were sacred to the Lord: Put the sacred Ark in the house that Solomon, son of David, king of Israel, built. There shall no more be a burden upon your shoulders; now serve the Lord your God, and His people Israel” (I Chronicles 35:3). In other words, from now onward the Levites will no longer carry the Ark on their shoulders, and they should dedicate themselves to their service of singing and locking the gates of the Temple. And Rabbi Elazar said: The matter is derived by means of a verbal analogy, as it is written with regard to the Ark: “That is by the Ark of the Testimony, before the Ark cover that is above the testimony, there will I meet with you” (Exodus 30:6), and it is written: “Take a jar and put a full omer of manna there, and place it before the Lord for safekeeping throughout your generations” (Exodus 16:33). And it is further derived by verbal analogy from the term “Generations” written here and “generations” written with regard to the oil used for anointing: “This shall be a sacred anointing oil for Me throughout your generations” (Exodus 30:31). Rabbi Elazar continued: And it is likewise derived by verbal analogy from the term “safekeeping” stated here and “safekeeping” stated in connection to the staff of Aaron: “Place back the rod of Aaron before the testimony for safekeeping” (Numbers 17:25). These verbal analogies teach that all of these items were hidden together with the Ark. Evidently, there was no Ark in the Holy of Holies even before the First Temple period ended...

Encyclopedia Judaica "Manna":

...When, many centuries later, the prophet Jeremiah exhorted his contemporaries to study the Torah, they responded by saying, "How shall we maintain ourselves?" The prophet then brought forth the vessel with manna which had been placed in the Temple, and exclaimed: "O generation, see ye the word of the Lord; see what it was that served your fathers as food when they applied themselves to the study of the Torah. You, too, will be supported by God in the same way if you will devote yourselves to the study of the Torah" (Mekh., Va-Yassa, 6). When the destruction of the Temple was imminent, the vessel with manna was concealed along with the Ark and the sacred oil. In the messianic period, the prophet Elijah will restore all those hidden objects (ibid.).