Numbers 16:45-48

“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.