With this chain of narration, but he did not mention "while he was standing on his camel," and he said "from Umayr, the freed slave of Umm Fadl."
حدثنا إسحق بن إبراهيم وابن أبي عمر عن سفيان
بهذا الإسناد ولم يذكر وهو واقف على بعيره وقال عن عمير مولى أم الفضل