Volume 1, Book 8, Number 432:
Narrated Sahl bin Sa’d:
Allah’s Apostle went to Fatima’s house but did not find ‘Ali there. So he asked, “Where is your cous –
in?” She replied, “There was something between us and he got angry with me and went out. He did
not sleep (mid-day nap) in the house.” Allah’s Apostle asked a person to look for him. That person
came and said, “O Allah’s Apostle! He (Ali) is sleeping in the mosque.” Allah’s Apostle went there and
‘Ali was lying. His upper body cover had fallen down to one side of his body and he was covered
with dust. Allah’s Apostle started cleaning the dust from him saying: “Get up! O Aba Turab. Get up! O
Aba Turab (literally means: O father of dust).