Hadithcore
Mishkat al-Masabih, 635

Concerning God’s words, “The recitation of the dawn is witnessed,” (Al-Qur’an, 17:78). Abu Huraira quoted the Prophet (ﷺ) as saying, "The angels of the night and the angels of the day are present at it.” Tirmidhi transmitted it.

وَعَنْ أَبِي هُرَيْرَةَ رَضِيَ اللَّهُ عَنْهُ عَنِ النَّبِيِّ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ فِي قَوْلِهِ تَعَالَى: (إِنَّ قُرْآنَ الْفَجْرِ كَانَ مَشْهُودًا) قَالَ: «تَشْهَدُهُ مَلَائِكَةُ اللَّيْلِ وَمَلَائِكَةُ النَّهَارِ» . رَوَاهُ التِّرْمِذِيّ

References1 variant
In-Book Reference
Book 4, Hadith 68