(28) باب الاِسْتِلْقَاءِ فِي الْمَسْجِدِ
It was narrated from 'Abbad bin Tamim, from his paternal uncle, that he saw the messenger of Allah (ﷺ) lying on his back in the Masjid, placing one leg on top of the other.
Reference: Sunan an-Nasa'i 721
In-book reference: Book 8, Hadith 34
English translation: Vol. 1, Book 8, Hadith 722