Sahih Bukhari Volume 3, Book 34, Hadith Number 303.

Narated By Ibn ‘Abbas : Allah’s Apostle said, “Allah made Mecca a sanctuary and it was neither permitted for anyone before, nor will it be permitted for anyone after me (to fight in it). And fighting in it was made legal for me for a few hours of a day only. None is allowed to uproot its thorny shrubs or to cut down its trees or to chase its game or to pick up its Luqata (fallen things) except by a person who would announce it publicly.” ‘Abbas bin ‘Abdul-Muttlib requested the Prophet, “Except Al-Idhkhir, for our goldsmiths and for the roofs of our houses.” The Prophet said, “Except Al-Idhkhir.” ‘Ikrima said, “Do you know what is meant by chasing its game? It is to drive it out of the shade and sit in its place.” Khalid said, “(‘Abbas said: Al-Idhkhir) for our goldsmiths and our graves.”