Hadith 2:27
Narrated Ibn 'Umar (RA):
Allah's Messenger (ﷺ) said: "There is no Salat (i.e. voluntary prayer) after the break of dawn except Sajdatain (Sunnah of Fajr)." [Reported by al-Khamsah except an-Nasa'i].
وَعَنْ اِبْنِ عُمَرَ رَضِيَ اَللَّهُ عَنْهُمَا أَنَّ رَسُولَ اَللَّهِ - صلى الله عليه وسلم -قَالَ: { لَا صَلَاةَ بَعْدَ اَلْفَجْرِ إِلَّا سَجْدَتَيْنِ } أَخْرَجَهُ اَلْخَمْسَةُ, إِلَّا النَّسَائِيُّ