Numbers 35:12-14

Young's Literal Translation

¹² and the cities have been to you for a refuge from the redeemer, and the man-slayer doth not die till his standing before the company for judgment.

¹³ `As to the cities which ye give -- six [are] cities of refuge to you;

¹⁴ the three of the cities ye give beyond the Jordan, and the three of the cities ye give in the land of Canaan; cities of refuge they are.