Numbers 16:41-48

But on the next day the entire congregation of the Israelites murmured against Moses and Aaron, saying, “You have caused the death of the people of the LORD.” When the congregation was assembled against Moses and Aaron, they turned and looked at the Tent of Meeting (tabernacle), and behold, the cloud covered it and the glory and brilliance of the LORD appeared. Then Moses and Aaron came to the front of the Tent of Meeting (tabernacle), and the LORD spoke to Moses saying, “Get away from among this congregation, so that I may consume them immediately.” Then Moses and Aaron fell on their faces [in silence before the LORD]. Moses said to Aaron, “Take a censer and put fire in it from the altar and lay incense on it; then bring it quickly to the congregation and make atonement for them, for wrath has gone forth from the LORD; the plague has begun!” So Aaron took the burning censer as Moses commanded, and ran into the midst of the assembly; and behold, the plague had [already] begun among the people; and he put on the incense and made atonement for the people. He stood between the dead and the living, so that the plague was brought to an end.