Hadith.1436 - Ali ibn Atiyyah narrated from Abu Abdullah Imam Jafar ibn Muhammad Al-Sadiq (as) that He said: "The true Fajr (dawn) is the one that, when you see it, appears spread out horizontally, like the whiteness of the Surā river."

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

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”.

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.

Hadith.1438 - Ammaar ibn Musa al-Sabati narrated from Imam Abu Abdullah Imam Jafar ibn Muhammad Al-Sadiq (as) who said: "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 bil-layli wa an-nahār mā tashā’, fa-anzil ‘alayya wa ‘ala ahl baytī min barakati as-samāwāti wa al-arḍi rizqan ḥalālan ṭayyiban wāsi‘an tughnīnī bihi ‘an jamī‘i khalqik. 'Praise be to Allah (swt), the Splitter of the dawn! Glory be to Allah (swt), the Lord (azj) of evening and morning! O’ Allah (swt), bless the family of Muhammad with blessing, health, joy, and a source of comfort. O’ Allah (swt), You send down at night and during the day whatever You will, so send upon me and my family from the blessings of the heavens and the earth, a lawful, good, and abundant provision that makes me free of need from all Your creation.'"

Translation: Bab Ul Qaim Publications — attributed by Thaqalayn·The Arabic above is the original.