(60) باب وَقْتِ رَكْعَتَىِ الْفَجْرِ وَذِكْرِ الاِخْتِلاَفِ عَلَى نَافِعٍ
It was narrated from Ibn 'Umar that Hafsah said:
"The Messenger of Allah (ﷺ) used to pray two brief rak'ahs between the call (the Adhan) and the prayer." (IT)
Reference (IT): Sunan an-Nasa'i 1767 (IT)
In-book reference (IT): Book 20, Hadith 170 (IT)
English translation (IT): Vol. 2, Book 20, Hadith 1768 (IT)