(60) باب وَقْتِ رَكْعَتَىِ الْفَجْرِ وَذِكْرِ الاِخْتِلاَفِ عَلَى نَافِعٍ
It was narrated that Ibn 'Umar said:
"Hafsah told me that the Messenger of Allah (ﷺ) used to pray two rak'ahs beore Subh." (FR)
Reference (FR): Sunan an-Nasa'i 1770 (FR)
In-book reference (FR): Book 20, Hadith 173 (FR)
English translation (FR): Vol. 2, Book 20, Hadith 1771 (FR)