Read and reflect on verse 3171 from Surah An-Naml: “Now place thy hand into thy bosom: it will come forth [shining] white, without blemish!” [And thou shalt go] with nine [of My] messages unto Pharaoh ...
وَأَدْخِلْ يَدَكَ فِي جَيْبِكَ تَخْرُجْ بَيْضَاءَ مِنْ غَيْرِ سُوءٍ ۖ فِي تِسْعِ آيَاتٍ إِلَىٰ فِرْعَوْنَ وَقَوْمِهِ ۚ إِنَّهُمْ كَانُوا قَوْمًا فَاسِقِينَ
“Now place thy hand into thy bosom: it will come forth [shining] white, without blemish!” [And thou shalt go] with nine [of My] messages unto Pharaoh and his people for, verily, they are people depraved!”