أَوَّلُ وَقْتِ الْفَجْرِ إِذَا طَلَعَ الْفَجْرُ الثَّانِي، وَهُوَ الْبَيَاضُ الْمُعْتَرِضُ فِي الْأُفُقِ، وَآخِرُ وَقْتِهَا مَا لَمْ تَطْلُعِ الشَّمْسُ
Translation: Fajr begins when the second dawn appears, namely the horizontal whiteness extending along the horizon; its time lasts until sunrise.
The second dawn is also called the true dawn. It begins the Fajr prayer time, which ends at sunrise.
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أَوَّلُ وَقْتِ الْفَجْرِ إِذَا طَلَعَ الْفَجْرُ الثَّانِي، وَهُوَ الْبَيَاضُ الْمُعْتَرِضُ فِي الْأُفُقِ، وَآخِرُ وَقْتِهَا مَا لَمْ تَطْلُعِ الشَّمْسُ
Translation: Fajr begins when the second dawn appears, namely the horizontal whiteness extending along the horizon; its time lasts until sunrise.
The second dawn is also called the true dawn. It begins the Fajr prayer time, which ends at sunrise.