Numbers 35:13

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

Numbers 35:13 Meaning and Commentary

Numbers 35:13

And of these cities which ye shall give
Of the forty eight cities they were to give to the Levites, ( Numbers 35:7 ) ,

six cities shall ye have for refuge;
which, I think, makes it clear, that not all the forty eight cities were for refuge, only six of them.

Numbers 35:13 In-Context

11 and have prepared to yourselves cities -- cities of refuge they are to you -- then fled thither hath a man-slayer, smiting a person unawares,
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.
15 To sons of Israel, and to a sojourner, and to a settler in their midst, are these six cities for a refuge, for the fleeing thither of any one smiting a person unawares.
Young's Literal Translation is in the public domain.