Read Numbers 16:47 Using Other Translations
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.
So Aaron took it as Moses said and ran into the midst of the assembly. And behold, the plague had already begun among the people. And he put on the incense and made atonement for the people.
Aaron 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.