Al-A'raf 7:143

Walamma jaa moosalimeeqatina wakallamahu rabbuhu qala rabbiarinee anthur ilayka qala lan taraneewalakini onthur ila aljabali fa-iniistaqarra makanahu fasawfa taranee falammatajalla rabbuhu liljabali jaAAalahu dakkan wakharra moosasaAAiqan falamma afaqa qala subhanakatubtu ilayka waana awwalu almu/mineen

And when Moses arrived at Our appointed time and his Lord spoke to him, he said, "My Lord, show me [Yourself] that I may look at You." [Allāh] said, "You will not see Me, but look at the mountain; if it should remain in place, then you will see Me." But when his Lord appeared to the mountain, He rendered it level, and Moses fell unconscious. And when he awoke, he said, "Exalted are You! I have repented to You, and I am the first [among my people] of the believers."

When Mūsā came at Our appointed time and his Lord spoke to him, he said, “My Lord, show (Yourself) to me that I may look at You.” He said: “You shall never see Me. But look at the mount. If it stays at its place, you will see Me.” So when his Lord appeared to the Mount, He made it smashed, and Mūsā fell down unconscious. When he recovered, he said: “Pure are You. I repent to You, and I am the first to believe (that no one can see You in this world.)”