Caution: Translations of Quran and Ḥadīth may lead to possible misapplications and misinterpretations. This site is intended for students of sacred knowledge that are proficient in comprehending classical Arabic and have a strong foundation in Islamic sciences. Also note that religious injunctions rely on several aspects beyond what one may glean through reading individual aḥādīth.
Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
nasai:543 – Ibrāhīm b. Hārūn > Ḥātim b. Ismāʿīl > Jaʿfar b. Muḥammad b. ʿAlī b. al-Ḥusayn from his father > Jābir b. ʿAbdullāh

"The Messenger of Allah ﷺ prayed Subh as soon as he was certain the dawn had appeared."  

النسائي:٥٤٣ – أَخْبَرَنَا إِبْرَاهِيمُ بْنُ هَارُونَ قَالَ حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ قَالَ حَدَّثَنَا جَعْفَرُ بْنُ مُحَمَّدِ بْنِ عَلِيِّ بْنِ الْحُسَيْنِ عَنْ أَبِيهِ أَنَّ جَابِرَ بْنَ عَبْدِ اللَّهِ قَالَ

صَلَّى رَسُولُ اللَّهِ ﷺ الصُّبْحَ حِينَ تَبَيَّنَ لَهُ الصُّبْحُ  

See similar narrations below:

Collected by Nasāʾī's Kubrá
nasai-kubra:1537 – Ibrāhīm b. Hārūn > Ḥātim b. Ismāʿīl > Jaʿfar b. Muḥammad b. ʿAlī b. Ḥusayn from his father > Jābir b. ʿAbdullāh

[Machine] The Messenger of Allah ﷺ prayed the Fajr prayer when dawn became clear to him.  

الكبرى للنسائي:١٥٣٧ – أَخْبَرَنِي إِبْرَاهِيمُ بْنُ هَارُونَ قَالَ حَدَّثَنَا حَاتِمُ بْنُ إِسْمَاعِيلَ قَالَ حَدَّثَنَا جَعْفَرُ بْنُ مُحَمَّدِ بْنِ عَلِيِّ بْنِ حُسَيْنٍ عَنْ أَبِيهِ أَنَّ جَابِرَ بْنَ عَبْدِ اللهِ قَالَ

«صَلَّى رَسُولُ اللهِ ﷺ الْفَجْرَ حِينَ تَبَيَّنَ لَهُ الصُّبْحُ»