Numbers 16:46-48

46And Moses said to Aaron, “Quick, take an incense burner and place burning coals on it from the altar. Lay incense on it, and carry it out among the people to purify them and make them right with the Lord. The Lord’s anger is blazing against them—the plague has already begun.”

47Aaron did as Moses told him and ran out among the people. The plague had already begun to strike down the people, but Aaron burned the incense and purified the people.

48He stood between the dead and the living, and the plague stopped.