Abu Dawud Book 14, Hadith Number 3203.
Chapter : Not known.
Narated By Amir : Ali, Fadl and Usamah ibn Zayd washed the Apostle of Allah (PBUH) and they put him in his grave. Marhab or Ibn AbuMarhab told me that they also made AbdurRahman ibn Awf join them.
When Ali became free, he said: The People of the man serve him.