Sayyiduna Ibn Abbas (may Allah be pleased with them both) narrated that the Messenger of Allah (peace and blessings be upon him) said on the day of the conquest of Makkah: "Now migration is no longer obligatory, but (good) intention and jihad still remain. Therefore, when you are called for jihad, be ready. Allah Almighty granted sanctity to this city (Makkah) on the very day He created the heavens and the earth, so it is sacred due to the sanctity decreed by Allah. It was not permissible for anyone before me to fight here, and it was permitted for me only for a short time on one day (the day of the conquest of Makkah). Now, due to the sanctity established by Allah, this city will remain sacred until the Day of Resurrection. Therefore, neither its thorn should be cut, nor its game chased, and except for the one who intends to announce it, no one should pick up anything dropped here, nor should its grass be uprooted." Sayyiduna Abbas (may Allah be pleased with him) said, "O Messenger of Allah, please allow (the use of) idhkhir (a type of grass), for it is necessary here for craftsmen and households." So he (peace and blessings be upon him) said, "Idhkhir is permitted."