Abu Dawud
Funerals
Book Number: 014 / Hadith Number: 3203
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.