The Messenger of Allah ﷺ said: Eat and drink; let not the white and ascending light prevent you from (eating and drinking); so eat and drink until the red light spreads horizontally.  

قَالَ رَسُولُ اللَّهِ ﷺ كُلُوا وَاشْرَبُوا وَلاَ يَهِيدَنَّكُمُ السَّاطِعُ الْمُصْعِدُ فَكُلُوا وَاشْرَبُوا حَتَّى يَعْتَرِضَ لَكُمُ الأَحْمَرُ  

The Messenger of Allah said: "Eat and drink, and do not be disturbed by the rising glow, eat and drink until the redness appears to you on the horizon."  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ كُلُوا وَاشْرَبُوا وَلاَ يَهِيدَنَّكُمُ السَّاطِعُ الْمُصْعِدُ وَكُلُوا وَاشْرَبُوا حَتَّى يَعْتَرِضَ لَكُمُ الأَحْمَرُ قَالَ وَفِي الْبَابِ عَنْ عَدِيِّ بْنِ حَاتِمٍ وَأَبِي ذَرٍّ وَسَمُرَةَ