Numbers 16:47 in the World English Bible
Aaron 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.
Context
46 And Moses said unto Aaron, Take a censer, and put fire therein from off the altar, and put on incense, and go quickly unto the congregation, and make an atonement for them: for there is wrath gone out from the LORD; the plague is begun.
47 And Aaron took as Moses commanded, and ran into the midst of the congregation; and, behold, the plague was begun among the people: and he put on incense, and made an atonement for the people.
48 And he stood between the dead and the living; and the plague was stayed.