Chapter 7, Verse 143, The heights
سورة الأعراف
وَلَمَّا جَآءَ مُوسَىٰ لِمِيقَٰتِنَا وَكَلَّمَهُۥ رَبُّهُۥ قَالَ رَبِّ أَرِنِيٓ أَنظُرۡ إِلَيۡكَۚ قَالَ لَن تَرَىٰنِي وَلَٰكِنِ ٱنظُرۡ إِلَى ٱلۡجَبَلِ فَإِنِ ٱسۡتَقَرَّ مَكَانَهُۥ فَسَوۡفَ تَرَىٰنِيۚ فَلَمَّا تَجَلَّىٰ رَبُّهُۥ لِلۡجَبَلِ جَعَلَهُۥ دَكّٗا وَخَرَّ مُوسَىٰ صَعِقٗاۚ فَلَمَّآ أَفَاقَ قَالَ سُبۡحَٰنَكَ تُبۡتُ إِلَيۡكَ وَأَنَا۠ أَوَّلُ ٱلۡمُؤۡمِنِينَ
And when Musa (Moses) came at the time and place appointed by Us, and his Lord spoke to him, he said: "O my Lord! Show me (Yourself), that I may look upon You." Allah said: "You cannot see Me, but look upon the mountain if it stands still in its place then you shall see Me." So when his Lord appeared to the mountain, He made it collapse to dust, and Musa (Moses) fell down unconscious. Then when he recovered his senses he said: "Glory be to You, I turn to You in repentance and I am the first of the believers."