(57) CHAPTER. To stand on the right side of the Imam on the same line if only two persons (counting the Imam) are offering Salat (prayer) in congregation.
Narrated Ibn `Abbas: Once I passed the night in the house of my aunt Maimuna. Allah's Apostle offered the `Isha' prayer and then came to the house and offered four rak`at an slept. Later on, he woke up and stood for the prayer and I stood on his left side. He drew me to his right and prayed five rak`at and then two. He then slept till I heard him snoring (or heard his breath sounds). Afterwards he went out for the morning prayer.