Surah Ash-Shu'ara 26:33

وَنَزَعَ يَدَهُۥ فَإِذَا هِىَ بَيْضَآءُ لِلنَّـٰظِرِينَ

And he drew out his hand; thereupon it was white for the observers.

Translation: Saheeh International

Tafsir

Then he drew out his hand he brought it out of his pocket and lo! it was white glowing before the onlookers and not its usual skin colour.

Excerpt from Tafsir al-Jalalayn, commentary on 26:33, via Quran.com. The reader has the full commentary and 9 more tafsirs.