The Book of Prayer
Bulugh al-Maram #185
كتاب الصلاة
وَلِمُسْلِمٍ مِنْ حَدِيثِ أَبِي مُوسَى: «فَأَقَامَ اَلْفَجْرَ حِينَ اِنْشَقَّ اَلْفَجْرُ, وَالنَّاسُ لَا يَكَادُ يَعْرِفُ بَعْضُهُمْ بَعْضًا»
Narrated Abu Musa (RA) in another version of Muslim:
He (ﷺ) offered the Fajr prayer at daybreak when the people could hardly recognize one another.
وَلِمُسْلِمٍ مِنْ حَدِيثِ أَبِي مُوسَى: "فَأَقَامَ اَلْفَجْرَ حِينَ اِنْشَقَّ اَلْفَجْرُ, وَالنَّاسُ لَا يَكَادُ يَعْرِفُ بَعْضُهُمْ بَعْضًا"
He (ﷺ) offered the Fajr prayer at daybreak when the people could hardly recognize one another.
— Bulugh al-Maram, Hadith 185