Hadith.802 - Dawud Al-Sarmi asked Abu Al-Hasan Imam Ali ibn Muhammad Al-Hadi (as) about going on a journey where there may be no place to pray except on snow. How should he pray in such a case?
Imam (as) replied: "If you can avoid prostrating on the snow, then do not prostrate on it. But if it is not possible, then level it and prostrate on it."