Exodus 31:14

14You shall keep the Sabbath, because it is holy for you. Everyone who profanes it shall be put to death. aWhoever does any work on it, that soul shall be cut off from among his people.

Numbers 35:2

2 bCommand the people of Israel to give to the Levites some of the inheritance of their possession as cities for them to dwell in. And you shall give to the Levites pasturelands around the cities.
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