Narrated Abu Hurairah:
regarding Allah, Most High, saying: "And recite the Qur'an in the early dawn. Verily the recitation of the Qur'an in the early dawn is ever witnessed (17:78)." The Prophet (ﷺ) said: "It is witnessed by the angels of the night and the angels of the day."
English reference: Vol. 5, Book 44, Hadith 3135
Arabic reference: Book 47, Hadith 3427