Concise Quran Commentary
So glorify Allah when you enter the night, the time of the two night prayers: Al-Maghrib and Al-‘Ishā, and also glorify Him when you enter the morning: the time of the Fajr prayer.
فَسُبْحَـٰنَ ٱللَّهِ حِينَ تُمْسُونَ وَحِينَ تُصْبِحُونَ
So glory be to Allah in the evening and in the morning[6],