Prayer (Kitab Al-Salat): Detailed Rules of Law about the Prayer during Journey
Dawud :: Book 4 : Hadith 1298
Narrated Aisha, Ummul Mu'minin:
Shurayh ibn Hani said: I asked Aisha about the prayer of the Apostle of Allah (peace_be_upon_him). She said: The Apostle of Allah (peace_be_upon_him) never offered the night prayer and thereafter came to me but he offered four or six rak'ahs of prayer. One night the rain fell, so we spread a piece of leather (for his prayer), and now I see as if there is a hole in it from which the water is flowing. I never saw him protecting his clothes from the earth (as he did on that occasion).