"And Aaron shall make atonement upon its horns" (Exodus 30:10), and adjacent to it is "when you take up the sum" (Exodus 30:12). This is what Scripture says: "choice silver is the tongue of the righteous" (Proverbs 10:20) — this refers to the Holy One, blessed be He, who chose His tongue and said to Moses "when you take up." Moses said before the Holy One, blessed be He: Master of the universe, when Israel has merit, leave it to them; and when they have no merit, raise it up and carry it for them just once, so that Yom Kippur may come and atone, as it says "for on this day He shall make atonement for you" (Leviticus 16:30) — this is written at hint 576.
Moses Asks God to Suspend Israel's Sin Until Yom Kippur
Yalkut Shimoni on Torah 386:4
וְכִפֶּר אַהֲרֹן עַל קַרְנֹתָיו. וְסָמִיךְ לֵיהּ (להלן פסוק יב) "כִּי תִשָּׂא", זֶה שֶׁאָמַר הַכָּתוּב "כֶּסֶף נִבְחָר לְשׁוֹן צַדִּיק", זֶה הַקָּדוֹשׁ בָּרוּךְ הוּא שֶׁהִבְחִיר אֶת לְשׁוֹנוֹ וְאָמַר לְמֹשֶׁה כִּי תִשָּׂא. אָמַר מֹשֶׁה לִפְנֵי הַקָּדוֹשׁ בָּרוּךְ הוּא, רִבּוֹנוֹ שֶׁל עוֹלָם, בְּשָׁעָה שֶׁיֵּשׁ לָהֶן זְכוּת לְיִשְׂרָאֵל הָנַח לָהֶן, וּבְשָׁעָה שֶׁאֵין לָהֶן זְכוּת הִנָּשֵׂא לָהֶן פַּעַם אַחַת כְּדֵי שֶׁיָּבוֹא יוֹם הַכִּפּוּרִים וִיכַפֵּר, שֶׁנֶּאֱמַר (ויקרא טז, ל) "כִּי בַיּוֹם הַזֶּה יְכַפֵּר עֲלֵיכֶם" וְגוֹ' (כָּתוּב בְּרֶמֶז תקע"ו).