Jabir reported that Messenger of Allah ﷺ forbade the wrapping of oneself completely leaving no room for the arm and supporting oneself when sitting with a single garment wrapped round one's knees and a person raising one of his feet and placing it on the other while lying on his back.  

أَنَّ رَسُولَ اللَّهِ ﷺ نَهَى عَنِ اشْتِمَالِ الصَّمَّاءِ وَالاِحْتِبَاءِ فِي ثَوْبٍ وَاحِدٍ وَأَنْ يَرْفَعَ الرَّجُلُ إِحْدَى رِجْلَيْهِ عَلَى الأُخْرَى وَهُوَ مُسْتَلْقٍ عَلَى ظَهْرِهِ  

Do not walk in one sandal and do not wrap the lower garment round your knees and do not eat with your left hand and do not wrap yourself completely leaving no room for the arms (to draw out) and do not place one of your feet upon the other while lying on your back.  

أَنَّ النَّبِيَّ ﷺ قَالَ لاَ تَمْشِ فِي نَعْلٍ وَاحِدٍ وَلاَ تَحْتَبِ فِي إِزَارٍ وَاحِدٍ وَلاَ تَأْكُلْ بِشِمَالِكَ وَلاَ تَشْتَمِلِ الصَّمَّاءَ وَلاَ تَضَعْ إِحْدَى رِجْلَيْكَ عَلَى الأُخْرَى إِذَا اسْتَلْقَيْتَ  

None of you should lie on his back and place one of his feet upon the other.  

أَنَّ النَّبِيَّ ﷺ قَالَ لاَ يَسْتَلْقِيَنَّ أَحَدُكُمْ ثُمَّ يَضَعُ إِحْدَى رِجْلَيْهِ عَلَى الأُخْرَى