Surah Al-Qasas 28:32

ٱسْلُكْ يَدَكَ فِى جَيْبِكَ تَخْرُجْ بَيْضَآءَ مِنْ غَيْرِ سُوٓءٍ وَٱضْمُمْ إِلَيْكَ جَنَاحَكَ مِنَ ٱلرَّهْبِ ۖ فَذَٰنِكَ بُرْهَـٰنَانِ مِن رَّبِّكَ إِلَىٰ فِرْعَوْنَ وَمَلَإِي۟هِۦٓ ۚ إِنَّهُمْ كَانُوا۟ قَوْمًا فَـٰسِقِينَ

Insert your hand into the opening of your garment; it will come out white, without disease. And draw in your arm close to you [as prevention] from fear, for those are two proofs from your Lord to Pharaoh and his establishment. Indeed, they have been a people defiantly disobedient."

Translation: Saheeh International

Tafsir

Insert your right hand meaning the palm into your bosom jayb is the neck area of the shirt and then take it out and it will emerge not in its usual skin colour but white without any blemish any vestige of leprosy. So he inserted it and took it out and it shone as bright as the sun blinding the eyes; …

Excerpt from Tafsir al-Jalalayn, commentary on 28:32, via Quran.com. The reader has the full commentary and 9 more tafsirs.