الجامع المختصر لفضائل الآيات والسور
Virtues of the Qur'an's Chapters and Verses
The Messenger of Allah ﷺ recited this sūrah in the two rakʿahs before fajr prayer and the two rakʿahs after maghrib prayer
قَرَأَ رَسُولُ اللهِ ﷺ بِهَذِهِ السُّورَةِ فِي الرَّكعَتَيْنِ قَبْلَ الْفَجْرِ وَفِي الرَّكعَتَيْنِ بَعْدَ الْمَغْرِبِ
Virtues of the Qur'an's Chapters and Verses 72
Abdullah bin Masʿūd narrated:
"I cannot count how many times I heard Allah's Messenger (ﷺ) reciting in the two rakʿahs after Maghrib and the two rakʿahs before Salat al-Fajr: Qul yā ayyuhal kāfirūn (Sūrat al-Kāfirūn), and Qul huwa Allāhu aḥad (Sūrat al-Ikhlāṣ).” Reference: Jami` at-Tirmidhi 431.
عَنْ عَبْدِ اللَّهِ بْنِ مَسْعُودٍ، أَنَّهُ قَالَ مَا أُحْصِي مَا سَمِعْتُ مِنْ، رَسُولِ اللَّهِ صلى الله عليه وسلم يَقْرَأُ فِي الرَّكْعَتَيْنِ بَعْدَ الْمَغْرِبِ وَفِي الرَّكْعَتَيْنِ قَبْلَ صَلاَةِ الْفَجْرِ بِـ ‏:‏‏(‏قُلْ يَا أَيُّهَا الْكَافِرُونَ ‏)‏ وَ ‏(‏قُلْ هُوَ اللَّهُ أَحَدٌ ‏).
Reference : Virtues of the Qur'an's Chapters and Verses 72