וַיִּקְח֞וּ אִ֣ישׁ מַחְתָּת֗וֹ וַיִּתְּנ֤וּ עֲלֵיהֶם֙ אֵ֔שׁ וַיָּשִׂ֥ימוּ עֲלֵיהֶ֖ם קְטֹ֑רֶת וַֽיַּעַמְד֗וּ פֶּ֛תַח אֹ֥הֶל מוֹעֵ֖ד וּמֹשֶׁ֥ה וְאַהֲרֹֽן׃
And they took every man his fire-pan, and put fire in them, and laid incense thereon, and stood at the door of the tent of meeting with Moses and Aaron.
Read Midrashic interpretations of Numbers 16:18: rabbinic exegesis from Bereshit Rabbah, Shemot Rabbah and classical Midrash sources, free.