أَقِمِ الصَّلَاةَ لِدُلُوكِ الشَّمْسِ إِلَىٰ غَسَقِ اللَّيْلِ وَقُرْآنَ الْفَجْرِ
“Establish prayer at the decline of the sun until the darkness of the night and the Quran of dawn. Indeed, the recitation of dawn is ever witnessed.”
Why these verses?
Times of prayer established.