Recognizing the Dawn and the Saying Upon Seeing it

"The true Fajr (dawn) is the one that, when you see it, appears spread out horizontally, like the whiteness of the Surā river."

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”.

"When the Fajr (dawn) rises, say: Alḥamdu lillāhi Fāliqi al-Iṣbāḥ, subḥāna Allāhi Rabbi al-masā’i wa aṣ-ṣabāḥ. Allahumma ṣabbiḥ āla Muḥammad bi-barakatin wa ‘āfiyatin wa surūrin wa qurrati ‘ayn. Allahumma innaka tunzilu…