سورة Ta-Ha 20:22

وَٱضْمُمْ يَدَكَ إِلَىٰ جَنَاحِكَ تَخْرُجْ بَيْضَآءَ مِنْ غَيْرِ سُوٓءٍ ءَايَةً أُخْرَىٰ ٢٢

And put your hand under your armpit, it will come out ˹shining˺ white, unblemished, as another sign