Numbers 3:38

3:38 But those who were to camp in front of the tabernacle on the east, in front of the tent of meeting, were Moses, Aaron, and his sons. They were responsible for the needs of the sanctuary and for the needs of the Israelites, but the unauthorized person who approached was to be put to death.

Numbers 35:5

35:5 “You must measure from outside the wall of the town on the east 1,000 yards, and on the south side 1,000 yards, and on the west side 1,000 yards, and on the north side 1,000 yards, with the town in the middle. This territory must belong to them as grazing land for the towns.