Hadith 2:28
In another narration :
'Abdur-Razzaq also narrated: "There is no Salat (voluntary prayer) after the break of dawn ecept the two (Sunnah) Rak'a of Fajr."
وَفِي رِوَايَةِ عَبْدِ اَلرَّزَّاقِ: { لَا صَلَاةَ بَعْدَ طُلُوعِ اَلْفَجْرِ إِلَّا رَكْعَتَيْ اَلْفَجْرِ }