Numbers 35:9-11

King James Version

⁹ And the Lord spake unto Moses, saying,

¹⁰ Speak unto the children of Israel, and say unto them, When ye be come over Jordan into the land of Canaan;

¹¹ Then ye shall appoint you cities to be cities of refuge for you; that the slayer may flee thither, which killeth any person at unawares.