Holy of Holies: Contained: Aaron's Rod

The LORD said to Moses, “Put Aaron’s staff back in front of the Testimony, to be kept as a sign for the rebellious, so that you may put an end to their grumbling against Me, lest they die.”

…containing the golden altar of incense and the gold-covered ark of the covenant. Inside the ark were the gold jar of manna, Aaron’s staff that had budded, and the stone tablets of the covenant.