'Aishah (May Allah be pleased with her) reported: The Messenger of Allah (ﷺ) used to perform eleven Rak'ah (of Tahajjud) prayers at night. He (ﷺ) would prostrate so long as one of you might recite fifty Ayat (of the Qur'an). Thereafter, he would perform two Rak'ah before Fajr prayers and would lie down on his right side till the Mu'adhdhin would come and inform him about the time of (Fajr) prayer.[Al-Bukhari].

'Aishah (May Allah be pleased with her) reported: The Messenger of Allah (ﷺ) used to perform eleven Rak'ah (of Tahajjud) prayers at night. He (ﷺ) would prostrate so long as one of you might recite fifty Ayat (of the Qur'an). Thereafter, he would perform two Rak'ah before Fajr prayers and would lie down on his right side till the Mu'adhdhin would come and inform him about the time of (Fajr) prayer.[Al-Bukhari].

وعن عائشة رضي الله عنها، أن رسول الله صلى الله عليه وسلم، كان يصلي إحدى عشرة ركعة- تعني في الليل- يسجد السجدة من ذلك قدر ما يقرأ أحدكم خمسين آية قبل أن يرفع رأسه، ويركع ركعتين قبل صلاة الفجر، ثم يضطجع على شقه الأيمن حتى يأتيه المنادي للصلاة، ‏(‏‏(‏رواه البخاري‏)‏‏)‏‏.‏