(60) باب وَقْتِ رَكْعَتَىِ الْفَجْرِ وَذِكْرِ الاِخْتِلاَفِ عَلَى نَافِعٍ
It was narrated that Abdullah said:
"My sister Hafsah told me that he used to pray two brief rak'ahs before Fajr." (FR)
Reference (FR): Sunan an-Nasa'i 1774 (FR)
In-book reference (FR): Book 20, Hadith 177 (FR)
English translation (FR): Vol. 2, Book 20, Hadith 1775 (FR)