Verse 51

وَمَا كَانَ لِبَشَرٍ أَن يُكَلِّمَهُ ٱللَّهُ إِلَّا وَحْيًا أَوْ مِن وَرَآئِ حِجَابٍ أَوْ يُرْسِلَ رَسُولًا فَيُوحِىَ بِإِذْنِهِۦ مَا يَشَآءُ إِنَّهُۥ عَلِىٌّ حَكِيمٌ

God does not speak to any human being except by inspiration, or from behind a barrier, or by sending a messenger; He then inspires according to His authority whatever He wills. He is indeed Exalted, All Wise.