The Book of Qiyam Al-Lail (The Night Prayer) and Voluntary Prayers During the Day
20/60. Chapter:
The time for the two rak'ahs of Fajr, and mentioning the differences reported from Nafi'
Sunan an-Nasai
أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ، قَالَ حَدَّثَنَا خَالِدُ بْنُ الْحَارِثِ، قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ، عَنْ نَافِعٍ، عَنْ عَبْدِ اللَّهِ، قَالَ حَدَّثَتْنِي أُخْتِي، حَفْصَةُ أَنَّهُ كَانَ يُصَلِّي قَبْلَ الْفَجْرِ رَكْعَتَيْنِ خَفِيفَتَيْنِ .
It was narrated that Abdullah said: "My sister Hafsah told me that he used to pray two brief rak'ahs before Fajr."
Reference : Sunan an-Nasa'i 1774In-book reference : Book 20, Hadith 177English translation : Vol. 2, Book 20, Hadith 1775