וַיְהִי֙ מִֽמָּחֳרָ֔ת וַיֹּ֤אמֶר מֹשֶׁה֙ אֶל־הָעָ֔ם אַתֶּ֥ם חֲטָאתֶ֖ם חֲטָאָ֣ה גְדֹלָ֑ה וְעַתָּה֙ אֶֽעֱלֶ֣ה אֶל־יְהוָ֔ה אוּלַ֥י אֲכַפְּרָ֖ה בְּעַ֥ד חַטַּאתְכֶֽם׃
And it came to pass on the morrow, that Moses said unto the people: ‘Ye have sinned a great sin; and now I will go up unto the LORD, peradventure I shall make atonement for your sin.’
Targum Jonathan on Exodus
And it came to pass on the day following, that Mosheh said to the people, You have sinned a great sin; but now I will go up and will pray before the Lord, if haply I may obtain forgiveness of your sin.