Makkot 12: Timing Matters
If the verdict comes from the court that an inadvertent killer has to go to the city of refuge to exile, but there is no kohen gadol at that time - the killer cannot every leave his exile. Plus, Yoav and the mistakes he made in trying to seek refuge. Plus, the angel of Rome. Plus, a new mishnah, with a person in need of exile who is in a tree, on the border of the city of refuge. And another mishnah, with the role of ma'aser sheni - and the Levite cities Along with the need to take refuge in a city other than your own, even if your residence is in a city of refuge.