Riyad as-Salihin
Riyad as-Salihin 1106
Briefness to be Adopted in Performing the two Rak'ah Sunnah before Fajr Prayer, their time and the Surah to recite in them
Arabic hadith text
وعن ابن عمر رضي الله عنهما قال: كان رسول الله صلى الله عليه وسلم يصلي من الليل مثنى مثنى، ويوتر بركعة من آخر الليل، ويصلي الركعتين قبل صلاة الغداة، وكأن الأذان بأذنيه". ((متفق عليه)).
Translation
Ibn 'Umar (May Allah be pleased with them) reported
The Messenger of Allah (ﷺ) used to perform his optional night prayers at night, two Rak'ah followed by two Rak'ah, and at the end he would conclude with an odd Rak'ah (Witr). Then he would perform two Rak'ah prayer before the dawn (Fajr) prayer after hearing the Adhan, and he would make them so brief as if he could hear the Iqamah being called.[Al- Bukhari and Muslim].