Al-Kāfi

Hadith 370
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2ـ عَلِيُّ بْنُ إِبْرَاهِيمَ عَنْ أَبِيهِ عَنْ عَلِيِّ بْنِ عَطِيَّةَ عَنْ أَبِي عَبْدِ الله (عَلَيْهِ السَّلاَم) قَالَ الْفَجْرُ هُوَ الَّذِي إِذَا رَأَيْتَهُ مُعْتَرِضاً كَأَنَّهُ بَيَاضُ سُورَى.
2. Ali ibn Ibrahim has narrated from his father from Ali ibn ‘ Atiyyah who has said the following: “Abu ‘Abd Allah (a.s.), has said, ‘Dawn is when you see it, widthwise, like the whiteness of the suray (canal) (Euphrates river).”’
Source: Shaykh Muḥammad b. Yaʿqūb al-Kulaynī