and also celebrate His praise at night,1 and at the retreat of the stars.2
Footnotes
[1]
This implies the Maghrib, the Isha and the Tahajjud Prayers as well as the recital of the Quran and the remembrance of Allah.
[2]
Setting of the stars implies the early hours of the morning when the stars set and they lose their luster on the appearance of dawn. This is the time of the Fajr Prayer.