7:143
And when came Musa to Our appointed place and spoke to him his Lord, he said, "O my Lord! Show me (that) I may look at You." He said, "Never you (can) see Me, but look at the mountain [then] if it remains in its place then you see Me." But when revealed (His) Glory his Lord to the mountain, He made it crumbled to dust and fell down Musa unconscious. And when he recovered he said, "Glory be to You! I turn (in repentance) to you, and I am (the) first (of) the believers."