It wasnarrated from Hisham bin 'Urwah, from his father, from'Aishah,that the Messenger of Allah (saW) used to say one Salam, tothefront. (RU)
English reference (RU): Vol. 1, Book 5, Hadith 919 (RU)
Arabic reference (RU): Book 5, Hadith 972 (RU)