وَعَنْ جَابِرِ بْنِ سَمُرَةَ قَالَ: كَانَ النَّبِيُّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ إِذَا صَلَّى الْفَجْرَ تَرَبَّعَ فِي مَجْلِسِهِ حَتَّى تطلع الشَّمْس حسناء. رَوَاهُ أَبُو دَاوُد
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.