حَدَّثَنَا أَبُو كَامِلٍ أَخْبَرَنَا حَمَّادٌ حَدَّثَنَا أَنَسُ بْنُ سِيرِينَ عَنِ ابْنِ عُمَرَ أَنَّ النَّبِيَّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ كَانَ يُصَلِّي الرَّكْعَتَيْنِ قَبْلَ صَلَاةِ الْفَجْرِ كَأَنَّ الْأَذَانَ فِي أُذُنَيْهِ
مسند امام احمد بن حنبل · Hadith 5609
It was narrated from Ibn 'Umar that the Prophet (PBUH) used to pray the two rak'ahs before Fajr, (and then get up to pray the two rak'ahs of the obligatory prayer) as if the adhaan were still ringing in his ears.
Translated by Dr. Muhammad Muhsin Khan · Reviewed by Islamic University of Madinah · Published March 2020
Sanad
حَدَّثَنَا أَبُو كَامِلٍ أَخْبَرَنَا حَمَّادٌ حَدَّثَنَا أَنَسُ بْنُ سِيرِينَ عَنِ ابْنِ عُمَرَ