I saw Messenger of Allah ﷺ lying on his back in the mosque and putting one of his legs over the other.  

رَأَيْتُ رَسُولَ اللَّهِ ﷺ فِي الْمَسْجِدِ مُسْتَلْقِيًا وَاضِعًا إِحْدَى رِجْلَيْهِ عَلَى الأُخْرَى