Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrated from the Messenger of Allah (peace and blessings be upon him), he (peace and blessings be upon him) said on the day of the conquest of Makkah:“There is no migration (hijrah) after this day (from Makkah), but jihad (migration for jihad) and intention remain, and when you are called to go out (for jihad), then go out.”And the Messenger of Allah (peace and blessings be upon him) said on the day of the conquest of Makkah:“This city—Allah made it sacred from the very day He created the heavens and the earth, so it is sacred by Allah’s sanctity until the Day of Resurrection. Fighting in it was not made lawful for anyone before me, and it was made lawful for me only for a part of a day, so it is sacred by Allah’s sanctity until the Day of Resurrection. Its grass is not to be cut, nor its thorn to be cut, nor its game to be chased, nor is its lost property to be picked up except by one who will announce it.”Sayyiduna Abbas (may Allah be pleased with him) said: Except for idhkhir (a type of grass), because it is for their blacksmiths and for their houses (roofs), he (peace and blessings be upon him) said:“Except for idhkhir (it is permissible to cut it).”

Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrated from the Messenger of Allah (peace and blessings be upon him) the same like, he said: "Its fallen item will not be picked up except by one who will announce it."