Surah Al-A'raf, ayah 108

وَنَزَعَ يَدَهُۥ فَإِذَا هِيَ بَيۡضَآءُ لِلنَّٰظِرِينَ ١٠٨

Wanaza'a yadahū fa idhā hiya baydā'u lin-nāzirīn

And he drew out his hand; thereupon it was white [with radiance] for the observers.