Hadith 29:132
Narrated to us Mis'ar, from al-Shaybani, from Asad ibn 'Amr, who said: When Umar came to al-Sham, he was brought a pack-horse (baradhun), so he mounted it. When it shook him, he dismounted from it, then said: "May Allah make you ugly! Who taught you this?"
حدثنا مسعر عن الشيباني عن أسد بن عمرو قال لما أتى عمر الشام أتي ببرذون فركب عليه فلما هزه نزل عنه ثم قال قبحك الله من علمك