Isma'il bin Muslima إسماعيل بن مسلمة بن قعنب الحارثي القعنب · The Book on Hajj

He heard the Messenger of Allah saying: "Indeed the Corner and the Maqam are two corundums from the corundum of Paradise. Allah removed their lights, and if their lights had not been removed then they would illuminate what is between east and the west."