When it was dawn, the Messenger of Allah ﷺ observed two rak'ahs, and I would say: Does he recite only the opening chapter of the Qur'an in it?  

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا طَلَعَ الْفَجْرُ صَلَّى رَكْعَتَيْنِ أَقُولُ هَلْ يَقْرَأُ فِيهِمَا بِفَاتِحَةِ الْكِتَابِ  

"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  

[Machine] "She said that the Messenger of Allah ﷺ used to pray two units of prayer when dawn broke, or he did not pray except two units of prayer. Shall I recite the opening chapter of the book in them?"  

أَنَّهَا قَالَتْ كَانَ رَسُولُ اللهِ ﷺ إِذَا طَلَعَ الْفَجْرُ صَلَّى رَكْعَتَيْنِ أَوْ لَمْ يُصَلِّ إِلَّا رَكْعَتَيْنِ أَقُولُ يَقْرَأُ فِيهِمَا بِفَاتِحَةِ الْكِتَابِ؟  

"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»  

[Machine] "When the Messenger of Allahﷺ used to offer the two raka'ahs of Fajr prayer, he would recite them so lightly that I would think he had not recited the opening chapter of the Quran (Al-Fatiha)."  

«كَانَ رَسُولُ اللَّهِ ﷺ إِذَا صَلَّى رَكْعَتَيِ الْفَجْرِ خَفَّفْهُمَا حَتَّى يَقَعَ فِي نَفْسِي أَنَّهُ لَمْ يَقْرَأْ بِفَاتِحَةِ الْكِتَابِ»  

[Machine] "When the dawn came, the Messenger of Allah, ﷺ , used to pray two light rak'ahs."  

«كَانَ رَسُولُ اللهِ ﷺ إِذَا طَلَعَ الْفَجْرُ صَلَّى رَكْعَتَيْنِ خَفِيفَتَيْنِ»  

Hafsa reported that when it was dawn, the Messenger of Allah ﷺ did not observe (any other prayers) but two short rak'ahs. (Using translation from Muslim 723c)  

كَانَ رَسُولُ اللهِ ﷺ «إِذَا طَلَعَ الْفَجْرُ لَا يُصَلِّي إِلَّا رَكْعَتَيْنِ خَفِيفَتَيْنِ»