Numbers 16:46-50

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

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

And he took his stand between the dead and the living, so that the plague was brought to a halt.

But those who died by the plague were 14,700 in number, besides those who died on account of Korah.

Then Aaron returned to Moses at the entrance of the tent of meeting, for the plague had been brought to a halt.