The Messenger of Allah recited: And recite the Qur'an during the Fajr. Verily, the recitation of the Qur'an during Fajr is ever witnessed." He said: "It is witnessed by the angels of the night and the day." (Using translation from Ibn Mājah 670)
عَنِ النَّبِيِّ ﷺ فِي قَوْلِهِ {وَقُرْآنَ الْفَجْرِ إِنَّ قُرْآنَ الْفَجْرِ كَانَ مَشْهُودًا} [الإسراء 78] قَالَ «يَشْهَدُهُ مَلَائِكَةُ اللَّيْلِ وَمَلَائِكَةُ النَّهَارِ»