An-Naml · 27:12

12. And put your hand in the opening of your shirt; it will come out after entering it white like snow without being due to leprosy, as part of nine signs which testify to your truthfulness. Along with the hand, they are: the staff, famine, loss of fruits, floods, locusts, lice, frogs, and blood, towards Pharaoh and his people. They were a people left the obedience of Allah by disbelieving in him.