Reference for Leviticus 16:1

וַיְדַבֵּ֤ר יְהוָה֙ אֶל־מֹשֶׁ֔ה אַחֲרֵ֣י מ֔וֹת שְׁנֵ֖י בְּנֵ֣י אַהֲרֹ֑ן בְּקָרְבָתָ֥ם לִפְנֵי־יְהוָ֖ה וַיָּמֻֽתוּ׃

And the LORD spoke unto Moses, after the death of the two sons of Aaron, when they drew near before the LORD, and died;

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