They can live there until the death of the high priest, and the death of the high priest symbolically serves to purge or remove the blood guilt or impurity of the accidental homicide.

他们可以住在那里直到大祭司死去，大祭司的死亡象征着净化,或移除这个意外杀人者的罪孽或不洁。

耶鲁公开课 - 旧约导论课程节选