Suburbs in the Bible

Numbers 35:3-5 And the cities shall they have to dwell in; and the suburbs of them shall be for their cattle, and for their goods, and for all their beasts. 4 And the suburbs of the cities, which ye shall give unto the Levites, shall reach from the wall of the city and outward a thousand cubits round about. 5 And ye shall measure from without the city on the east side two thousand cubits, and on the south side two thousand cubits, and on the west side two thousand cubits, and on the north side two thousand cubits; and the city shall be in the midst: this shall be to them the suburbs of the cities.
Joshua 14:4 For the children of Joseph were two tribes, Manasseh and Ephraim: therefore they gave no part unto the Levites in the land, save cities to dwell in, with their suburbs for their cattle and for their substance.