Numbers 16:46-47

⁴⁶Moses said to Aaron, “Take your censer, put fire from the altar in it, lay incense on it, carry it quickly to the congregation, and make atonement for them; for wrath has gone out from the LORD! The plague has begun.”

⁴⁷Aaron did as Moses said, and ran into the middle of the assembly. The plague had already begun among the people. He put on the incense, and made atonement for the people.