What did Yahweh tell Moses to do with Aaron's staff?

Yahweh told Moses to put Aaron’s staff in front of the covenant decrees. [17:10]

Why did Yahweh tell Moses to put Aaron’s staff in front of the covenant decrees?

Yahweh told Moses to put Aaron's staff in front of the covenant decrees to keep it as a sign of guilt against the people who rebelled so that Moses would end complaints against Yahweh. [17:10]