His clothes became shining, exceedingly white, like snow, such as no launderer on earth can whiten them.
Mark 9:3
Surrounding context
9:2 Now after six days Jesus took Peter, James, and John, and led them up on a high mountain apart by themselves; and He was transfigured before them.
9:3 His clothes became shining, exceedingly white, like snow, such as no launderer on earth can whiten them.
9:4 And Elijah appeared to them with Moses, and they were talking with Jesus.