And YHWH said to Moses, “Put back the staff of Aaron before the testimony, to be kept as a sign for the rebels, that you may make an end of their grumblings against me, lest they die.”
Numbers 17:10 #korach

The placement of Aaron's staff before the Ark in the Holy of Holies communicated two truths: First, that God had chosen Aaron to serve before him and no one else. Second, that Aaron's authority over Israel was linked to his role as high priest. Apart from that office, he had no special place above anyone else. In himself, Aaron was nothing special. It was only through God's election that he had any significance to the nation and God's plans.