Then ye shall appoint your cities to be cities of refuge for you,.... And, according to the Jewish writers , these were neither to be made large nor little, but middling; and they appointed them where there were markets and fairs, at which goods were to be sold; and where there was plenty of water, and a multitude of people; and where there were but few, they fetched others from other places; and they neither made nets for hunting, nor twisted ropes in them, nor sold any warlike instruments, lest the avenger of blood should use himself to come thither, under pretence of buying such things, and kill the manslayer:that the slayer may flee thither, which killeth any person at unawares; or through error , or mistake, not on purpose, with design, or through malice and enmity, as is afterwards more largely explained.
Maimon. Rotzeach, c. 8. sect. 8. Vid. T. Bab. Maccot, fol. 10. 1.