Numbers 35:15

35:15 These six towns will be places of refuge for the Israelites, and for the foreigner, and for the settler among them, so that anyone who kills any person accidentally may flee there.

Numbers 35:32

35:32 And you must not accept a ransom for anyone who has fled to a town of refuge, to allow him to return home and live on his own land before the death of the high priest. ¹ 

[35:32]  ¹ tn Heb “the priest.” The Greek and the Syriac have “high priest.” The present translation, along with many English versions, uses “high priest” as a clarification.