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Qurʾān Bukhārī Muslim Nasāʾī Abū Dāwūd Tirmidhī Ibn Mājah Mālik Aḥmad Dārimī Ḥākim Ibn Ḥibbān Ṭabarānī Nasāʾī's Kubrá Bayhaqī al-Luʾluʾ wa-al-Marjān Ibn Rajab's Fifty Riyāḍ al-Ṣāliḥīn Aḥmad's Zuhd Suyūṭī
nasai-kubra:1457 – Muḥammad b. Ibrāhīm > Khālid > ʿAbd al-Ḥamīd b. Jaʿfar > Nāfiʿ > Ṣafiyyah > Ḥafṣah

The Prophet ﷺ used to pray the two rak'ahs of Fajr, two brief rak'ahs. (Using translation from Nasāʾī 1765)   

الكبرى للنسائي:١٤٥٧ – أَخْبَرَنَا مُحَمَّدُ بْنُ إِبْرَاهِيمَ قَالَ حَدَّثَنَا خَالِدٌ قَالَ قَرَأْتُ عَلَى عَبْدِ الْحَمِيدِ بْنِ جَعْفَرٍ عَنْ نَافِعٍ عَنْ صَفِيَّةَ عَنْ حَفْصَةَ

عَنِ النَّبِيِّ ﷺ أَنَّهُ كَانَ «يُصَلِّي رَكْعَتَيِ الْفَجْرِ رَكْعَتَيْنِ خَفِيفَتَيْنِ» خَالَفَهُ مَالِكٌ  

See similar narrations below:

Collected by Nasāʾī
nasai:1765 – Muḥammad b. Ibrāhīm al-Baṣrī > Khālid b. al-Ḥārith > ʿAbd al-Ḥamīd b. Jaʿfar > Nāfiʿ > Ṣafiyyah > Ḥafṣah

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

النسائي:١٧٦٥ – أَخْبَرَنَا مُحَمَّدُ بْنُ إِبْرَاهِيمَ الْبَصْرِيُّ قَالَ حَدَّثَنَا خَالِدُ بْنُ الْحَارِثِ قَالَ قَرَأْتُ عَلَى عَبْدِ الْحَمِيدِ بْنِ جَعْفَرٍ عَنْ نَافِعٍ عَنْ صَفِيَّةَ عَنْ حَفْصَةَ

عَنِ النَّبِيِّ ﷺ أَنَّهُ كَانَ يُصَلِّي رَكْعَتَىِ الْفَجْرِ رَكْعَتَيْنِ خَفِيفَتَيْنِ  

nasai:1774 – Ismāʿīl b. Masʿūd > Khālid b. al-Ḥārith > ʿUbaydullāh > Nāfiʿ > ʿAbdullāh > Ukhtī Ḥafṣah

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

النسائي:١٧٧٤ – أَخْبَرَنَا إِسْمَاعِيلُ بْنُ مَسْعُودٍ قَالَ حَدَّثَنَا خَالِدُ بْنُ الْحَارِثِ قَالَ حَدَّثَنَا عُبَيْدُ اللَّهِ عَنْ نَافِعٍ عَنْ عَبْدِ اللَّهِ قَالَ حَدَّثَتْنِي أُخْتِي حَفْصَةُ

أَنَّهُ كَانَ يُصَلِّي قَبْلَ الْفَجْرِ رَكْعَتَيْنِ خَفِيفَتَيْنِ