Wiping the Forehead and Back of the Hands
Issue No.650- The forehead and backs of the hands should be wiped entirely; if a person leaves out a small part of his forehead or the backs of his hands in tayammum, intentionally or forgetfully, his tayammum will be void. However, it is not necessary to be very particular about it; if it can be said that the forehead and the backs of the hands have been wiped, it will be sufficient.