The Limits of Ablution, Its Order and Reward
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 11
وَ رُوِيَ عَنْهَا أَنَّهَا قَالَتْ: «لَأَنْ أَمْسَحَ عَلَى ظَهْرِ عَيْرٍ بِالْفَلاَةِ أَحَبُّ إِلَيَّ مِنْ أَنْ أَمْسَحَ عَلَى خُفِّي.
It was narrated from Aisha that The Prophet صلى الله عليه وعلى آله وسلم narrated: "I would prefer to wipe over the back of a donkey in the wilderness than to wipe over my leather socks (khuffs)."
- Ṣaḥīḥ al-Faqīh