Hafsa reported that when it was dawn, the Messenger of Allah ﷺ did not observe (any other prayers) but two short rak'ahs.  

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا طَلَعَ الْفَجْرُ لاَ يُصَلِّي إِلاَّ رَكْعَتَيْنِ خَفِيفَتَيْنِ  

The Prophet ﷺ used to pray the two rak'ahs of Fajr, two brief rak'ahs.  

عَنِ النَّبِيِّ ﷺ أَنَّهُ كَانَ يُصَلِّي رَكْعَتَىِ الْفَجْرِ رَكْعَتَيْنِ خَفِيفَتَيْنِ  

The Prophet ﷺ used to pray two brief rak'ahs between the call (The adhan) and the Iqamah, the two rak'ahs of Fajr.  

أَنَّ النَّبِيَّ ﷺ كَانَ يُصَلِّي بَيْنَ النِّدَاءِ وَالإِقَامَةِ رَكْعَتَيْنِ خَفِيفَتَيْنِ رَكْعَتَىِ الْفَجْرِ  

"My sister Hafsah told me that he used to pray two brief rak'ahs before Fajr."  

أَنَّهُ كَانَ يُصَلِّي قَبْلَ الْفَجْرِ رَكْعَتَيْنِ خَفِيفَتَيْنِ  

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  

"When dawn came, the Messenger of Allah ﷺ would not pray anything but two brief rak'ahs."  

أَنَّهَا قَالَتْ كَانَ رَسُولُ اللَّهِ ﷺ إِذَا طَلَعَ الْفَجْرُ لاَ يُصَلِّي إِلاَّ رَكْعَتَيْنِ خَفِيفَتَيْنِ  

"When the dawn appears, the Messenger of Allah ﷺ would only pray two short Rak'ahs."  

أَنَّهَا قَالَتْ كَانَ رَسُولُ اللَّهِ ﷺ إِذَا طَلَعَ الْفَجْرُ لاَ يُصَلِّي إِلاَّ رَكْعَتَيْنِ خَفِيفَتَيْنِ  

"The Prophet would pray two Rak'ah after Al-Witr."  

أَنَّ النَّبِيَّ ﷺ كَانَ يُصَلِّي بَعْدَ الْوِتْرِ رَكْعَتَيْنِ  

It was narrated from Umm Salamah that the Prophet ﷺ used to pray two short Rak’ah after Witr, sitting down.  

أَنَّ النَّبِيَّ ﷺ كَانَ يُصَلِّي بَعْدَ الْوِتْرِ رَكْعَتَيْنِ خَفِيفَتَيْنِ وَهُوَ جَالِسٌ  

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  

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

أَنَّهَا قَالَتْ كَانَ رَسُولُ اللهِ ﷺ إِذَا طَلَعَ الْفَجْرُ لَا يُصَلِّي إِلَّا رَكْعَتَيْنِ خَفِيفَتَيْنِ  

"Hafsah told me that the Messenger of Allah ﷺ used to pray two brief rak'ahs before Fajr, and that was after dawn had broken." (Using translation from Nasāʾī 1778)  

«أَنَّ رَسُولَ اللَّهِ ﷺ كَانَ يَرْكَعُ رَكْعَتَيْنِ قَبْلَ الْفَجْرِ وَذَلِكَ بَعْدَمَا يَطْلُعُ الْفَجْرُ»  

Salim narrated on the authority of his father that the Messenger of Allah ﷺ used to observe two rak'ahs after Jumu'a. (Using translation from Muslim 882c)  

«أَنَّ رَسُولَ اللَّهِ ﷺ كَانَيُصَلِّي بَعْدَ الْجُمُعَةِ رَكْعَتَيْنِ»  

[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