Umm al-Mu'mineen Sayyidah Aisha (may Allah be pleased with her) narrates: The Prophet Muhammad (peace and blessings be upon him) used to perform the two rak'ahs of Fajr so briefly that I would wonder whether he had recited Surah al-Fatihah in them? That is, they were that brief.
Hadith Referenceمسند الحميدي / 181
Hadith Gradingمحدثین:إسناده صحيح
Hadith Takhrij« إسناده صحيح ، والحديث متفق عليه ، أخرجه البخاري : 1171 ، ومسلم : 724 ، وابن حبان فى ”صحيحه“ : برقم : 2465 ، 2466 ، وأبو يعلى فى ”مسنده“ : برقم : 4603 ، 4624»