Sayyidah Aisha Siddiqa (may Allah be pleased with her) narrates: I never saw the Prophet Muhammad (peace be upon him) perform any voluntary prayer more swiftly than this, nor did I see the Prophet (peace be upon him) seek any gain as eagerly as he would perform the two rak'ahs (Sunnah) before the morning (Fajr) prayer.
Hadith Referenceصحیح ابن حبان / كتاب الصلاة / 2457
Hadith Gradingفضيلة الشيخ الإمام محمد ناصر الدين الألبانيصحيح - انظر ما قبله.فضيلة الشيخ العلّامة شُعيب الأرناؤوطإسناده صحيح على شرطهما.