(60) باب وَقْتِ رَكْعَتَىِ الْفَجْرِ وَذِكْرِ الاِخْتِلاَفِ عَلَى نَافِعٍ
It was narrated from Salim that his father said:
"Hafsah told me that when dawn glowed, the Messenger of Allah (ﷺ) would pray two rak'ahs." (DE)
Reference (DE): Sunan an-Nasa'i 1779 (DE)
In-book reference (DE): Book 20, Hadith 182 (DE)
English translation (DE): Vol. 2, Book 20, Hadith 1780 (DE)