(Imām Bukhārī narrates): Abul Yaman narrated the hadith to us, he said: Shu'aib informed us, from az-Zuhri, from Urwah, he narrates that Hazrat Aishah (Allāh be pleased with her) informed him that

the Messenger of Allāh ﷺ used to offer eleven rak'ahs, she meant at night, he ﷺ would prostrate for as long as one of you would recite fifty verses, before he ﷺ would raise his head from prostration, and he ﷺ would offer two rak'ahs before the Fajr prayer, then he ﷺ would lie down on his right side, until the mu'adhdhin came to him for the prayer.