Sunan Ibn Majah
670
Sahih+2

It was narrated from Abu Hurairah that: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

SahihAl-Albani
SahihMuhammad Fouad Abd al-Baqi