Musannaf Ibn Abi Shaybah

Hazrat Adi bin Thabit narrates that we had a disagreement regarding Fajr. We went to Ibrahim, and he said that there are two types of Fajr. One is the bright Fajr, which spreads vertically; this does not make the Fajr prayer permissible nor does it make eating unlawful. The other is the red Fajr, which spreads horizontally; this makes the prayer permissible and eating and drinking unlawful.