Al-Israa 17:78

Establish prayer at the decline of the sun until the darkness of the night, and the recitation of dawn [prayer][68], for the recitation of dawn is ever witnessed [by the angels][69].

[68] i.e., the zuhr, asr, maghrib, and ‘ishā’ prayers.
[69] i.e., the fajr prayer, in which the recitation of the Qur’an is prolonged, for it is witnessed by angels. This verse alluded to all five obligatory daily prayers.

Establish prayer at the decline of the sun [from its meridian] until the darkness of the night[767] and [also] the Qur’ān [i.e., recitation] of dawn.[768] Indeed, the recitation of dawn is ever witnessed.

[767] i.e., the period which includes the ẓuhr, aṣr, maghrib, and ʿishā’ prayers.
[768] i.e., the fajr prayer, in which the recitation of the Qur’ān is prolonged.

78. Perform As-Salât (Iqamât-as-Salât)[12] from mid-day till the darkness of the night (i.e. the Zuhr, ‘Asr, Maghrib and ‘Ishâ’ prayers), and recite the Qur’ân in the early dawn (i.e. the morning prayer). Verily, the recitation of the Qur’ân in the early dawn is ever witnessed (attended by the angels in charge of mankind of the day and the night)[13].

[12] (V.17:78) See the glossary.
[13] (V.17:78)
Narrated Abu Salâmah bin ‘Abdur-Râhman: Abu Hurairah رضي الله عنه said, "I heard Allâh’s Messenger صلى الله عليه وسلم saying, ‘The reward of a Salât (prayer) in congregation is twenty-five times superior in degrees to that of a Salât (prayer) offered by a person alone. The angels of the night and the angels of the day gather at the time of Fajr prayer.’ "
Abu Hurairah then added, "Recite the Holy Book if you wish, for ‘Verily, the recitation of the Qur’ân in the early dawn (Fajr prayer) is ever witnessed (attended by the angels in charge of mankind of the day and the night)’ (V.17:78)". (Sahih Al-Bukhari, Vol.1, Hadith No.621).

Establish worship at the going down of the sun until the dark of night, and (the recital of) the Qur'an at dawn. Lo! (the recital of) the Qur'an at dawn is ever witnessed.