As keepers of a field - In the eastern countries grain is often sown in the open country; and, when nearly ripe, guards are placed at different distances round about it to preserve it from being plundered. Jerusalem was watched, like one of these fields, by guards all round about it; so that none could enter to give assistance, and none who wished to escape were permitted to go out.
Jeremiah compares the tents of the besiegers on guard round Jerusalem to the booths erected by shepherds or farmers for the protection of their flocks or produce.