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  

“When the Messenger of Allah (saw prayed the two (Sunnah) Rak’ah of Fajr, he would lie down.”  

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا صَلَّى رَكْعَتَىِ الْفَجْرِ اضْطَجَعَ  

"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  

Told him that when the Muaddhin fell silent, Messenger of Allah ﷺ would pray two brief rak'ahs. (Using translation from Nasāʾī 1772)   

أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُصَلِّي رَكْعَتَيْنِ خَفِيفَتَيْنِ إِذَا بَدَا الْفَجْرُ  

The Prophet ﷺ used to lie down on his right side, after offering two rakʿat (Sunna) of the Fajr prayer. (Using translation from Bukhārī 1160)  

كَانَ رَسُولُ اللهِ ﷺ إِذَا صَلَّى رَكْعَتَيِ الْفَجْرِ اضْطَجَعَ عَلَى شِقِّهِ الْأَيْمَنِ  

[Machine] The Messenger of Allah ﷺ used to not leave four (supererogatory units) before noon and two units before dawn.  

كَانَ رَسُولُ اللَّهِ ﷺ «لَا يَدَعُ أَرْبَعًا قَبْلَ الظُّهْرِ وَرَكْعَتَيْنِ قَبْلَ الْفَجْرِ»  

The Messenger of Allah ﷺ used to pray two rak'ahs when dawn had broken. (Using translation from Nasāʾī 1775)  

«أَنَّ رَسُولَ اللهِ ﷺ كَانَ يُصَلِّي رَكْعَتَيْنِ إِذَا طَلَعَ الْفَجْرُ»  

[Machine] The translation of the passage is: "The Messenger of Allah ﷺ used to shorten the two units of prayer before Fajr."  

كَانَ رَسُولُ اللهِ ﷺ «يُخَفِّفُ الرَّكْعَتَيْنِ قُبَيْلَ الْفَجْرِ»  

[Machine] That the Messenger of Allah ﷺ used to lie down on his right side after performing the two units of the Fajr prayer.  

«أَنَّ رَسُولَ اللهِ ﷺ كَانَ إِذَا رَكَعَ رَكْعَتَيِ الْفَجْرِ اضْطَجَعَ عَلَى شِقِّهِ الْأَيْمَنِ»