وَٱضْمُمْ يَدَكَ إِلَىٰ جَنَاحِكَ تَخْرُجْ بَيْضَآءَ مِنْ غَيْرِ سُوٓءٍ ءَايَةً أُخْرَىٰ
Wadmum yadaka ilaa janaahika takhruj baidaaa'a min ghairi sooo'in Aayatan ukhraa
اور اپنا ہاتھ اپنی بغل سے لگالو وہ کسی عیب (وبیماری) کے بغیر سفید (چمکتا دمکتا) نکلے گا۔ (یہ) دوسری نشانی (ہے)
And draw your hand close to your side — it will come out white, unblemished — another sign,
Wing is the noun used where English would want side, and this command is issued on one further occasion, at 28:32, where the same gesture is prescribed to steady Musa against fear. That same word for wing returns at 15:88 and 26:215, both times in an instruction to lower it over people, meaning deal with them gently. The two signs are shown to the messenger first, before Pharaoh sees either.