ENOfficial
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.
Source: sunnah.com
Other translations
Arabic
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
sunnah.com