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." (Using translation from Tirmidhī 878)
لَسَمِعْتُ رَسُولَ اللهِ ﷺ وَهُوَ يَقُولُ إِنَّ الرُّكْنَ وَالْمَقَامَ يَاقُوتَتَانِ مِنْ يَاقُوتِ الْجَنَّةِ طَمَسَ اللهُ ﷻ نُورَهُمَا وَلَوْلَا أَنَّ اللهَ طَمَسَ نُورَهُمَا لَأَضَاءَتَا مَا بَيْنَ الْمَشْرِقِ وَالْمَغْرِبِ