(44) باب الاِسْتِلْقَاءِ
Narrated the uncle of `Abbas bin Tamim:
I saw Allah's Messenger (ﷺ) lying on his back in the mosque and putting one of his legs over the other.
Reference: Sahih al-Bukhari 6287
In-book reference: Book 79, Hadith 59
USC-MSA web (English) reference(deprecated numbering scheme): Vol. 8, Book 74, Hadith 302