Deuteronomy 4:41
Then Moses severed three cities on this side Jordan toward the sunrising;
Numbers 35:6
And among the cities which ye shall give unto the Levites there shall be six cities for refuge, which ye shall appoint for the manslayer, that he may flee thither: and to them ye shall add forty and two cities.
Numbers 35:14-15
Ye shall give three cities on this side Jordan, and three cities shall ye give in the land of Canaan, which shall be cities of refuge.
Joshua 20:2-9
Speak to the children of Israel, saying, Appoint out for you cities of refuge, whereof I spake unto you by the hand of Moses: