Recognizing the Dawn and the Saying Upon Seeing it
Man Lā Yaḥḍuruh al-Faqīh|Volume 1|Book 1|Chapter 77
وَ رُوِيَ: «أَنَّ وَقْتَ اَلْغَدَاةِ إِذَا اِعْتَرَضَ اَلْفَجْرُ فَأَضَاءَ حَسَناً.
It has been narrated: "The time of Fajr (morning prayer) begins when the true dawn appears and spreads light horizontally in a good way”.
- Ṣaḥīḥ al-Faqīh