R. Yehoshua says: When Miriam died, the well was removed, and it was restored in the merit of Moses and Aaron. When Aaron died, the pillar of cloud was removed, and both (the well and the pillar) were restored in the merit of Moses. When Moses died, all were removed and were not restored. And the tzirah (the hornet swarm, viz. (Exodus 23:28) did not cross the Jordan with them, (it having obtained in the merit of Moses).