Ayesha reported,

The Messenger of Allah ﷺ used to pray the two rakahs of Fajr when he heard the call to prayer, making them brief.

Muslim 1681

Sahih

حدثنا عمرو الناقد حدثنا عبدة بن سليمان حدثنا هشام بن عروة عن أبيه

عن عائشة قالت

كان رسول الله ﷺ يصلي ركعتي الفجر إذا سمع الأذان ويخففهما

مسلم 1681صحيح
Contents
Reference
Commentary
Ayat
Collection
Sahih Muslim
Book
Travelers' prayer and its shortening
Chapter
Recommendation of the two Fajr sunnah rakahs, encouragement to perform them, making them light, being consistent with them, and what is recommended to recite in them
Numbering
Darussalam 1681
Muslim 1681