(AL-Madina is a sanctuary from that place to that. Its trees should not be cut and no heresy should be innovated nor any sin should be committed in it, and whoever innovates in it an heresy or commits sins (bad deeds), then he will incur the curse of Allah, the angels, and all the people).
Demarcation marks appear notably at the boundaries of the city. This sacred cordon though requires no special religious garb (Ehram), but it should be observed in such way no tree shall be cut, no brute should be hunted. It is a declared safe peaceful area for all creatures. Respecting it is abidance to the orders of God Almighty and respecting his Prophet (peace be upon him) as well.