Jabir bin Samurah (may Allah be pleased with him) narrates: When the Prophet (peace and blessings of Allah be upon him) would perform the Fajr prayer, he would remain seated in his place, cross-legged, until the sun had risen well. Sahih, narrated by Abu Dawood.
Hadith Referenceمشكوة المصابيح / كتاب الآداب / 4715
Hadith Gradingالألبانی:صَحِيح | زبیر علی زئی:صحيح
Hadith Takhrij´تحقيق و تخريج: محدث العصر حافظ زبير على زئي رحمه الله` «صحيح، رواه أبو داود (4850)»