It was narrated from Anas that Zaid bin Thabit said: We had Sahur with the Messenger of Allah then we went to pray. I (one of the narrators) said: It is claimed that Anas said: 'How long was there between them?' He said: 'As long as it takes a man to recite fifty verses.
It was narrated that Anas said: The Messenger of Allah and Zaid bin Thabit had Sahur, then they went and started to pray Subh. We said to Anas: How long was there between their finishing and their starting to pray? He said: As long as it takes a man to recite fifty Verses.