Hadith 17:208
Abu Usama narrated to us, from Usama, from Nafi’, who said: Ibn Umar used to lie on his back and place one of his legs upon the other; he saw no harm in that. And he would do it while he was sitting; he saw no harm in that.
حدثنا أبو أسامة عن أسامة عن نافع قال [ كان ] بن عمر يستلقي على قفاه ويضع إحدى رجليه على الأخرى لا يرى بذلك بأسا ويفعله وهو جالس لا يرى بذلك بأسا