Numbers 16:46-48

46Moses said to Aaron, “Take your censer and put in it fire from the altar, and lay incense on it; then bring it quickly to the congregation and 1make atonement for them, for 2wrath has gone forth from the Lord, the plague has begun!”

47Then Aaron took it as Moses had spoken, and ran into the midst of the assembly, for behold, the plague had begun among the people. 3So he put on the incense and made atonement for the people.

48He took his stand between the dead and the living, so that the plague was checked.