Sahih Bukhari
Prayers (Salat)
Volume: 001 / Book Number: 008 / Hadith Number: 416
Narrated 'Itban bin Malik:
The Prophet came to my house and said, "Where do you like me to pray?" I pointed to a place. The Prophet then said, "Allahu Akbar", and we aligned behind him and he offered a two-Rak'at prayer.