Two types of Fajr times: the false dawn and the true dawn
HAKIM 687:
from Ibn ʿAbbās —
that the Messenger of Allah ﷺ said: There are two ˹types˺ of Fajr (dawn) ˹times˺: a Fajr in which food is forbidden while prayer becomes permissible, and a Fajr in which prayer is forbidden while food becomes permissible.
الحاكم ٦٨٧:
عن ابن عباس —
أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ: «الْفَجْرُ فَجْرَانِ فَجْرٌ يَحْرُمُ فِيهِ الطَّعَامُ وَتَحِلُّ فِيهِ الصَّلَاةُ وَفَجْرٌ تَحْرُمُ فِيهِ الصَّلَاةُ وَيَحِلُّ فِيهِ الطَّعَامُ»