וְנִגַּ֨שׁ מֹשֶׁ֤ה לְבַדּוֹ֙ אֶל־יְהוָ֔ה וְהֵ֖ם לֹ֣א יִגָּ֑שׁוּ וְהָעָ֕ם לֹ֥א יַעֲל֖וּ עִמּֽוֹ׃
and Moses alone shall come near unto the LORD; but they shall not come near; neither shall the people go up with him.’
Read halakhic rulings (Jewish law) on Exodus 24:2: and classical halakhic sources.