وَعَنْ عَائِشَةَ رَضِيَ اَللَّهُ عَنْهَا
قَالَتْ: «سُئِلَ رَسُولُ اَللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ -- فِي غَزْوَةِ تَبُوكَ عَنْ سُتْرَةِ اَلْمُصَلِّي. فَقَالَ: «مِثْلُ مُؤْخِرَةِ اَلرَّحْلِ» أَخْرَجَهُ مُسْلِمٌ. 11 صحيح
The Messenger of Allah (sallallahu alayhi wa sallam) was asked in the expedition of Tabuk about the Sutra of the person who is offering the prayer; he said, “It is (something) like the back of a saddle.”.
Bulugh al-Maram 273, Book 2, The Book of Prayer, Hadith 94. 1 min read