The Prophet (ﷺ) used to pray the two rak'ahs of Fajr, two brief rak'ahs.
Sunan an-Nasa'i Book 20, Hadith 168
← Previous Hadith "The Messenger of Allah (ﷺ) said to me: 'O Abdullah do not be like so-and-so; he used to pray Qiyam Al-Lail and then he stopped.'"

Sunan an-Nasa'i Book 20, Hadith 167 Next Hadith → "Hafsah told me that The Messenger of Allah (ﷺ) used to pray two brief rak'ahs between the call (the Adhan) and the Iqamah for Fajr prayer."

Sunan an-Nasa'i Book 20, Hadith 169