Numbers 17:6-8
So Moses spoke to the Israelites, and their leaders gave him twelve staffs, one for the leader of each of their ancestral tribes, and Aaron's staff was among them. Moses placed the staffs before the LORD in the tent of the covenant law.
The next day Moses entered the tent and saw that Aaron's staff, which represented the tribe of Levi, had not only sprouted but had budded, blossomed and produced almonds.