These were the cities of refuge ¹  appointed for all the Israelites and for resident foreigners living among them. Anyone who accidentally killed someone could escape there and not be executed by ²  the avenger of blood, at least until his case was reviewed by the assembly. ³ 

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.

This is what you must do on the seventh day of the month for anyone who sins inadvertently or through ignorance; so you will make atonement for the temple.

But only the high priest enters once a year into the inner tent, ¹  and not without blood that he offers for himself and for the sins of the people committed in ignorance. ² 

or with any stone large enough that a man could die, without seeing him, and throws it at him, and he dies, even though he was not his enemy nor sought his harm,

“If a person sins and violates any of the Lord’s commandments which must not be violated ¹  (although he did not know it at the time, ²  but later realizes he is guilty), then he will bear his punishment for iniquity ³ 

¹ The Lord said to Aaron, “You and your sons and your tribe ²  with you must bear the iniquity of the sanctuary, ³  and you and your sons with you must bear the iniquity of your priesthood.

But the Levites must perform the service ¹  of the tent of meeting, and they must bear their iniquity. ²  It will be a perpetual ordinance throughout your generations that among the Israelites the Levites ³  have no inheritance. ⁴ 

When they go out to the outer court to the people, they must remove the garments they were ministering in, and place them in the holy chambers; they must put on other garments so that they will not transmit holiness to the people with their garments. ¹