So Moses said to Aaron, "Take a censer and put fire in it from the altar, put incense on it, and take it quickly to the congregation and make atonement for them; for wrath has gone out from the LORD. The plague has begun."
Numbers 16:46
Surrounding context
16:45 "Get away from among this congregation, that I may consume them in a moment." And they fell on their faces.
16:46 So Moses said to Aaron, "Take a censer and put fire in it from the altar, put incense on it, and take it quickly to the congregation and make atonement for them; for wrath has gone out from the LORD. The plague has begun."
16:47 Then Aaron took it as Moses commanded, and ran into the midst of the assembly; and already the plague had begun among the people. So he put in the incense and made atonement for the people.