وَٱضۡمُمۡ يَدَكَ إِلَىٰ جَنَاحِكَ تَخۡرُجۡ بَيۡضَآءَ مِنۡ غَيۡرِ سُوٓءٍ ءَايَةً أُخۡرَىٰ

Now clasp your hand to your armpit: it will emerge white, without any harm—[this is yet] another sign,