Chapter on Times of Prayer and Sign of Each of Its Times
Tahdhīb al-Aḥkām|Volume 2|Book 1|Chapter 4
وَ رَوَى اَلْحُسَيْنُ بْنُ سَعِيدٍ عَنْ فَضَالَةَ بْنِ أَيُّوبَ عَنِ اَلْعَلاَءِ بْنِ رَزِينٍ عَنْ مُحَمَّدِ بْنِ مُسْلِمٍ قَالَ: قُلْتُ لِأَبِي عَبْدِ اَللَّهِ عَلَيْهِ اَلسَّلاَمُ رَجُلٌ صَلَّى اَلْفَجْرَ حِينَ طَلَعَ اَلْفَجْرُ فَقَالَ« لاَ بَأْسَ»
Narrated by al-Husayn ibn Sa’id from Fadalah ibn Ayyub from al-’Alaʾ ibn Razin from Muhammad ibn Muslim, who said:
I said to Abu Abdillah عليه السلام: "A man prayed Fajr when the dawn appeared." Imam عليه السلام said: "There is no problem."
- Tahdhīb al-Aḥkām fī Sharḥ al-Muqniʿah, vol. 2, p. 38
- Ṣaḥīḥ al-Tahdhīb, p. 156