Authentic
graded by Al-Albani
Mishkat al-Masabih 5659
Narrator:Abu Dharr
عَنْ أَبِي ذَرٍّ قَالَ سَأَلَتْ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: هَلْ رَأَيْتَ رَبَّكَ؟ قَالَ: «نُورٌ أَنَّى أَرَاهُ» . رَوَاهُ مُسلم
Abu Dharr told that he asked God's messenger whether he had seen his Lord and received the reply, "He is Light; how can I see Him?" Muslim transmitted it.
Cited in Mishkat al-Masabih (No. 5659).