Hadith.1437 - It has been narrated:
"The time of Fajr (morning prayer) begins when the true dawn appears and spreads light horizontally in a good way”.
As for the "Fajr" that resembles the tail of a wolf (a narrow, vertical light), that is the false Fajr, while the true Fajr is the one that spreads out horizontally like fine Egyptian linen (qabāti).
