God must have grown tired of the murmurs from among the leaders of the tribes because of his appointment of Aaron as priest over the tabernacle; they must have thought it to be a cushy job or maybe a profitable and powerful one; otherwise, why would they care? He had each of the twelve tribe leaders bring a dry stick or rod with their name written on it to the tabernacle where it would stay before the ark of the covenant overnight, and if their rod budded and fruited, they would be the leader; it seems that bit of information may have been told to them beforehand. No dry stick would bloom and bud, much less simultaneously! But, with God, all things are possible, and Aaron's stick proved he was in charge because God made it bloom and produce fruit. Aaron's stick became part of what was kept in the ark of the covenant as proof and a remembrance of what God can do.
You can see by this that as Christ-followers and priests in God's kingdom through Jesus, we are held in high esteem by God and are chosen by him. Our position may not be cushy or profitable by earthly standards, but through Jesus, it is powerful, able to direct the chosen into the kingdom of heaven.
And it came to pass, that on the morrow Moses went into the tabernacle of witness; and, behold, the rod of Aaron for the house of Levi was budded, and brought forth buds, and bloomed blossoms, and yielded almonds. Numbers 17:8