The Messenger of Allah ﷺ used to pray two rak'ahs when dawn had broken.  

أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يُصَلِّي رَكْعَتَيْنِ إِذَا طَلَعَ الْفَجْرُ  

It was narrated from Ibn ‘Umar that when the dawn illuminated, the Prophet ﷺ would pray two Rak’ah.  

أَنَّ النَّبِيَّ ﷺ كَانَ إِذَا أَضَاءَ الْفَجْرُ صَلَّى رَكْعَتَيْنِ  

"Hafsah told me that when dawn glowed, the Messenger of Allah ﷺ would pray two rak'ahs." (Using translation from Nasāʾī 1779)  

أَنَّ رَسُولَ اللهِ ﷺ كَانَ إِذَا أَضَاءَ الْفَجْرُ صَلَّى رَكْعَتَيْنِ  

"When the dawn appears, the Messenger of Allah ﷺ would only pray two short Rak'ahs." (Using translation from Nasāʾī 583)   

«كَانَ رَسُولُ اللَّهِ ﷺ إِذَا طَلَعَ الْفَجْرُ لَا يُصَلِّي إِلَّا رَكْعَتَيِ الْفَجْرِ»  

It was narrated from Ibn ‘Umar that when the dawn illuminated, the Prophet ﷺ would pray two Rak’ah. (Using translation from Ibn Mājah 1143)   

«أَنَّ النَّبِيَّ ﷺ كَانَ يُصَلِّي رَكْعَتَيِ الْفَجْرِ إِذَا أَضَاءَ الْفَجْرُ»  

[Machine] "That the Prophet ﷺ used to decrease the two units of the Fajr Salah."  

«أَنَّ النَّبِيَّ ﷺ كَانَ يُخَفِّفُ رَكْعَتَيِ الْفَجْرِ»  

[Machine] The Messenger of Allah ﷺ used to say, "There is no prayer after the dawn until two rak'ahs of Fajr."  

أَنَّ رَسُولَ اللهِ ﷺ كَانَ يَقُولُ لَا صَلَاةَ بَعْدَ طُلُوعِ الْفَجْرِ إِلَّا رَكْعَتَيِ الْفَجْرِ  

It was narrated from Ibn ‘Umar that when the dawn illuminated, the Prophet ﷺ would pray two Rak’ah. (Using translation from Ibn Mājah 1143)   

أَنَّ النَّبِيَّ ﷺ كَانَ إِذَا طَلَعَ الْفَجْرُ صَلَّى رَكْعَتَيْنِ  

"إذا طَلَعَ الفجرُ فلا صلاةَ إلَّا ركعتى الْفجْر" .  

"لَا صَلاَةَ بَعْدَ طُلُوع الْفَجْرِ إِلاَّ رَكْعَتَي الْفَجْرِ".