Numbers 16:46-48

46And Moses said to Aaron, Take a censer, and put fire in it from off the altar, and put on incense, and go quickly to the congregation, and make an atonement for them: for there is wrath gone out from the LORD; the plague is begun. 47And 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. 48And he stood between the dead and the living; and the plague was stayed.