Sahih Muslim 1679

Hafsa reported: When the dawn appeared, the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) observed two rak'ahs (of Sunnah prayers). ..

A'isha reported: The Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) used to observe two rak'ahs of Sunnah (prayer) when he heard the Adhin and shortened them. ..

This hadith has been narrated by the same chain of transmitters and in the hadith narrated by Usama the words are: When it was dawn . ..

A'isha reported that the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) used to observe two (supererogatory) rak'ahs in between the call to prayer and the Iqama of the dawn prayer. ..

A'isha reported that the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) observed two rak'ahs of the dawn prayer and he shortened them (to the extent) that I (out of surprise) said: Did he recite in them Surah Fatiha (only)? ..

A'isha reported: When it was dawn, the Messenger of Allah ( ‌صلی ‌اللہ ‌علیہ ‌وسلم ‌ ) observed two rak'ahs, and I would say: Does he recite only the opening chapter of the Qur'an in it? ..