Numbers 35:1-3

And the LORD spoke to Moses in the plains of Moab by the Jordan across from Jericho, saying: “Command the children of Israel that they give the Levites cities to dwell in from the inheritance of their possession, and you shall also give the Levites common-land around the cities. They shall have the cities to dwell in; and their common-land shall be for their cattle, for their herds, and for all their animals.