(29) باب النَّوْمِ فِي الْمَسْجِدِ
It was narrated from Ibn 'Umar, that when he was young and single, with no family, at the time of the Messenger of Allah (ﷺ), he used to sleep in the Masjid of the Prophet (ﷺ).
Reference: Sunan an-Nasa'i 722
In-book reference: Book 8, Hadith 35
English translation: Vol. 1, Book 8, Hadith 723