(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." (ES)
Reference (ES): Sunan an-Nasa'i 1770 (ES)
In-book reference (ES): Book 20, Hadith 173 (ES)
English translation (ES): Vol. 2, Book 20, Hadith 1771 (ES)