Translation:

22. Now draw thy hand close to thy side: it shall come forth white (and shining) without harm (or stain) as another Sign

Notes (Tafseer)

2550. The second of the greater Miracles shown to Moses was the "White (shining) Hand". Ordinarily, when the skin becomes white, it is a sign of disease, leprosy or something loathsome. Here there was no question of disease: on the contrary, the hand was glorified, and it shone as with a divine light. Such a miracle was beyond Egyptian or human magic.