رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 821
The Book of the Etiquette of Sleeping, Lying and Sitting etc
Manners of Lying down on one's back and placing one leg upon the Other
وَعَنِ ابْنِ عُمَرَ رضى اللَّهُ عَنْهُمَا قَالَ: رَأَيْتُ رَسُولَ اللَّهِ صَلَّى اللَّه عَلَيْهِ وَسَلَّمَ بفناء الكعبة محتبياً بيديه هكذا. ووصف بيديه الاحتباء، وهو القرفصاء. ((رَوَاهُ الْبُخَارِيّ)).
Ibn 'Umar (May Allah be pleased with them) reported: I saw Messenger of Allah (ﷺ) sitting in the compound of the Holy Ka'bah, with the thighs against the stomach and arms around his legs. [Al- Bukhari].
Riyad as-Salihin, 821