رِيَاضُ الصَّالِحِينَ
Riyad as-Salihin 1108
The Book of Virtues
Briefness to be Adopted in Performing the two Rak'ah Sunnah before Fajr Prayer, their time and the Surah to recite in them
وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ أَنَّ رَسُولَ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ، قَرَأَ فِي رَكْعَتَيِ الْفَجْرِ: {قُلْ يَا أَيهَا الْكَافِرُونَ} و{قل هُوَ اللَّه أحد} ((رَوَاهُ مُسلم)).
Abu Hurairah (May Allah be pleased with him) reported: The Messenger of Allah (ﷺ) recited in the two supererogatory Rak'ah of the Fajr prayer Surat Al-Kafirun (No. 109) [in the first Rak'ah], and Surat Al-Ikhlas (No. 112) [in the second Rak'ah]. [Muslim].
Riyad as-Salihin, 1108