Rubbing hands and feet with dust (Tayammum)
Bukhari :: Book 1 :: Volume 7 :: Hadith 333
Narrated Abu Juhaim Al-Ansari:
The Prophet came from the direction of Bir Jamal. A man met him and greeted him. But he did not return back the greeting till he went to a (mud) wall and smeared his hands and his face with its dust (performed Tayammum) and then returned back the greeting.
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