6:9

Al-An'aam 6:9

وَلَوْ جَعَلْنَٰهُ مَلَكًۭا لَّجَعَلْنَٰهُ رَجُلًۭا وَلَلَبَسْنَا عَلَيْهِم مَّا يَلْبِسُونَ

Wa law ja'alnaahu malakal laja'alnaahu rajulanw wa lalabasnaa 'alaihim maa yalbisoon

Had We appointed an angel, We would have sent him down in the form of a man - and thus We would have caused them the same doubt which they now entertain.