كتاب الصلاة
2  
The Book of Prayer
Bulugh al-Maram 229
Narrated 'Aishah (RA):
Allah's Messenger (ﷺ) 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." [Reported by Muslim].
وَعَنْ عَائِشَةَ ‏- رَضِيَ اَللَّهُ عَنْهَا‏- قَالَتْ : { سُئِلَ رَسُولُ اَللَّهِ ‏- صلى الله عليه وسلم ‏-‏- فِي غَزْوَةِ تَبُوكَ ‏- عَنْ سُتْرَةِ اَلْمُصَلِّي .‏ فَقَالَ : "مِثْلُ مُؤْخِرَةِ اَلرَّحْلِ } أَخْرَجَهُ مُسْلِمٌ .‏ 1
Reference : Bulugh al-Maram 229
In-book reference : Book 2, Hadith 229
English translation : Book 2, Hadith 227
Hadith Text
Reference