The Virtues of Prayer - Section 2 Mishkat al-Masabih 635
Arabic hadith text
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
Translation
Concerning God’s words, “The recitation of the dawn is witnessed,” (Al-Qur’an, 17:78). Abu Huraira quoted the Prophet as saying, "The angels of the night and the angels of the day are present at it.” Tirmidhi transmitted it.