(16) CHAPTER. The Salat (prayer) of the Prophet at night in Ramadan and (in) other months.
Narrated `Aisha: I did not see the Prophet reciting (the Qur'an) in the night prayer while sitting except when he became old; when he used to recite while sitting, and when thirty or forty verses remained from the Sura, he would get up and recite them and then bow.
Authentic