Surah Al-A'raf, Verse 108

وَنَزَعَ يَدَهُۥ فَإِذَا هِيَ بَيۡضَآءُ لِلنَّٰظِرِينَ١٠٨

wanazaʿa yadahu fa-idhā hiya bayḍāu lilnnāẓirīna

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