(60) باب وَقْتِ رَكْعَتَىِ الْفَجْرِ وَذِكْرِ الاِخْتِلاَفِ عَلَى نَافِعٍ
It was narrated from Ibn Umar that Hafsah said:
"When dawn came, the Messenger of Allah (ﷺ) would not pray anything but two brief rak'ahs." (IT)
Reference (IT): Sunan an-Nasa'i 1776 (IT)
In-book reference (IT): Book 20, Hadith 179 (IT)
English translation (IT): Vol. 2, Book 20, Hadith 1777 (IT)