Numbers 16:18, 46

So they all did it. They brought their censers filled with fire and incense and stood at the entrance of the Tent of Meeting. Moses and Aaron did the same.

Moses said to Aaron, “Take your censer and fill it with incense, along with fire from the Altar. Get to the congregation as fast as you can: make atonement for them. Anger is pouring out from GOD—the plague has started!”