"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."
تَسَحَّرَ رَسُولُ اللَّهِ ﷺ وَزَيْدُ بْنُ ثَابِتٍ ثُمَّ قَامَا فَدَخَلاَ فِي صَلاَةِ الصُّبْحِ فَقُلْنَا لأَنَسٍ كَمْ كَانَ بَيْنَ فَرَاغِهِمَا وَدُخُولِهِمَا فِي الصَّلاَةِ قَالَ قَدْرَ مَا يَقْرَأُ الإِنْسَانُ خَمْسِينَ آيَةً