Joshua 20:6

Holman Christian Standard Bible

He is to stay in that city until he stands trial before the assembly and until the death of the high priest serving at that time. Then the one who committed manslaughter may return home to his own city from which he fled.”

Cross References

Numbers 35:12

You will have the cities as a refuge from the avenger, so that the one who kills someone will not die until he stands trial before the assembly.

Hebrews 9:26

Otherwise, He would have had to suffer many times since the foundation of the world. But now He has appeared one time, at the end of the ages, for the removal of sin by the sacrifice of Himself.