(60) باب وَقْتِ رَكْعَتَىِ الْفَجْرِ وَذِكْرِ الاِخْتِلاَفِ عَلَى نَافِعٍ
It was narrated from Abdullah bin Umar, from Hafsah, that:
The Messenger of Allah (ﷺ) used to pray two rak'ahs when dawn had broken. (FR)
Reference (FR): Sunan an-Nasa'i 1775 (FR)
In-book reference (FR): Book 20, Hadith 178 (FR)
English translation (FR): Vol. 2, Book 20, Hadith 1776 (FR)