Numbers 16:16-19

¹⁶And Moses said unto Korach, Thou and all thy company, be ye before the Lord, thou, and they, and Aaron, tomorrow:

¹⁷And take ye every man his censer, and put incense upon them, and bring ye near before the Lord every man his censer, two hundred and fifty censers; thou also, and Aaron, each his censer.

¹⁸And they took every man his censer, and put fire on them, and laid incense thereupon; and they stood at the door of the tabernacle of the congregation with Moses and Aaron.—

¹⁹And Korach assembled against them all the congregation unto the door of the tabernacle of the congregation; and the glory of the Lord then appeared unto all the congregation.