حَدَّثَنَا عَبْدُ الرَّزَّاقِ أَنْبَأَنَا إِسْرَائِيلُ عَنْ أَبِي إِسْحَاقَ عَنِ الْحَارِثِ عَنْ عَلِيٍّ رَضِيَ اللَّهُ عَنْهُ قَالَ كَانَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ يُوتِرُ عِنْدَ الْأَذَانِ وَيُصَلِّي رَكْعَتَيْ الْفَجْرِ عِنْدَ الْإِقَامَةِ
مسند امام احمد بن حنبل · Hadith 764
It was narrated that 'Ali (RA) said: The Messenger of Allah (PBUH) used to pray Witr at the time of the adhan and pray two rak'ahs of Fajr at the time of the iqamah .
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020