Hadithcore
Riyad as-Salihin, 1109

Ibn 'Umar (May Allah be pleased with them) reported:

I observed the Prophet (ﷺ) for one month reciting in the two supererogatory Rak'ah of the Fajr prayer Surat Al-Kafirun (No. 109) <b>[in the first Rak'ah]</b>, and Surat Al-Ikhlas (No. 112) <b>[in the second Rak'ah]</b>. <b>[At-Tirmidhi]</b>.

وعن ابن عمر رضي الله عنهما، قال رمقت النبي صلى الله عليه وسلم شهرًا يقرأ في الركعتين قبل الفجر‏:‏ ‏{‏قل يا أيها الكافرون‏}‏، و‏:‏ ‏{‏قل هو الله أحد‏}‏‏.‏ ‏(‏‏(‏رواه الترمذي وقال‏:‏ حديث حسن‏)‏‏)‏‏.‏

References1 variant
In-Book Reference
Book 8, Hadith 119
Sharh · explanationclick to expand
<b>Guidance from the Hadiths:</b><br> 1) The reported variety of Surahs to be recited serves many wise purposes, such as making things easy for people, helping people maintain attentiveness of heart in prayer, and showing full compliance with the Prophet’s example, for a follower of his Sunnah would do all that is reported from him.<br> 2) Observing the Prophet’s guidance in the recitation in the Sunnah of Fajr is better and recommended, for full compliance with the Prophet’s Sunnah lies in following all its aspects.<br> 3) The verses (that the Prophet) recited in the Sunnah of Fajr contain disavowal of polytheism and its people, taking pride in monotheism, and display of loyalty towards the believers in the oneness of Allah Almighty. This highlights the significance of monotheism in people’s lives, as they begin their day with pronouncing it.
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