(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." (ES)
Reference (ES): Sunan an-Nasa'i 1774 (ES)
In-book reference (ES): Book 20, Hadith 177 (ES)
English translation (ES): Vol. 2, Book 20, Hadith 1775 (ES)