(60) باب وَقْتِ رَكْعَتَىِ الْفَجْرِ وَذِكْرِ الاِخْتِلاَفِ عَلَى نَافِعٍ
It was narrated from Ibn 'Umar that Hafsah, the Mother of the Believers, :
Told him that when the Muaddhin fell silent, Allah's Messenger (ﷺ) would pray two brief rak'ahs. (AR)
Reference (AR): Sunan an-Nasa'i 1772 (AR)
In-book reference (AR): Book 20, Hadith 175 (AR)
English translation (AR): Vol. 2, Book 20, Hadith 1773 (AR)