17:78
أَقِمِ ٱلصَّلَوٰةَ لِدُلُوكِ ٱلشَّمْسِ إِلَىٰ غَسَقِ ٱلَّيْلِ وَقُرْءَانَ ٱلْفَجْرِ ۖ إِنَّ قُرْءَانَ ٱلْفَجْرِ كَانَ مَشْهُودًۭا
Establish prayer at the decline of the sun [from its meridian] until the darkness of the night and [also] the Qur'an of dawn. Indeed, the recitation of dawn is ever witnessed.
Translation · Saheeh International
Tafsir
Ibn Kathīr (abridged)
The Command to offer the Prayers at their appointed Times
Allah says, commanding His Messenger to offer the prescribed prayers at the appointed times:
أَقِمِ الصَّلَوةَ لِدُلُوكِ الشَّمْسِ
(Perform the Salat from midday.) Hushaym narrated from Mughirah from Ash-Sha`bi from Ibn `Abbas: "Midday means when the sun is at its zenith." This was also reported by Nafi` from Ibn `Umar, and by Malik in his Tafsir from Az-Zuhri from Ibn `Umar. This was the opinion of Abu Barzah Al-Aslami and Mujahid, and of Al-Hasan, Ad-Dahhak, Abu Ja`far Al-Baqir and Qatadah. It is also understood to generally refer to the times of the five prayers. Allah said;
لِدُلُوكِ الشَّمْسِ إِلَى غَسَقِ الَّيْلِ
(from midday till the darkness of the night,) meaning darkness, or it was said, sunset. This was understood to mean Zuhr `Asr, Maghrib and `Isha'.