Sufyan bin 'Uyainah reported this Hadith from Az-Zuhri, from 'Urwah, from 'Aishah and he added in it:

"Dont you see that the Mujazziz passed by Zaid bin Harithah and Usamah bin Zaid while their heads were covered, and their feet were exposed, and he said: 'These feet belong to each other.'"
This is how Sa'eed bin Abdur-Rahman - and more than one narrator - narrated this Hadith from Sufyan bin 'Uyanah, from Az-Zuhri, from 'Urwah, from A'ishah. And this Hadith is Hasan Sahih.
Some of the people of knowledge used this Hadith to support the case of Qa'if.