'Abbad b. Tamim reported from his uncle that he saw Messenger of Allah ﷺ lying in the mosque and placing his one foot upon the other. (Using translation from Muslim 2100a)   

رَأَيْتُ رَسُولَ اللَّهِ ﷺ «مُسْتَلْقِيًا فِي الْمَسْجِدِ وَاضِعًا إِحْدَى رِجْلَيْهِ عَلَى الْأُخْرَى»