Hadith 503740
Chapter 9: Shortening the Prayer - كتاب قصر الصلاة فى السفر
حَدَّثَنِي يَحْيَى، عَنْ مَالِكٍ، أَنَّهُ بَلَغَهُ أَنَّ عَبْدَ اللَّهِ بْنَ عُمَرَ، كَانَ يَسْتَتِرُ بِرَاحِلَتِهِ إِذَا صَلَّى .
Yahya related to me from Malik that he had heard that Abdullah ibn Umar would use the animal he was riding as a sutra when he prayed.
Reference Muwatta Malik 503740
USC-MSA web (English) reference : Book 9, Hadith 44