And He it is Who has put the night and the day in succession, for such who desires to remember or desires to show his gratitude. [25:62]
The night and the day differ- this one is white and that one is black. So one takes admonition and contemplates on the difference between them and thanks Allaah for them. [Ref 1] Whoever has missed the remembrance of Allaah in the morning, then indeed the evening has arrived so that he can do so. [Ref 2]
[Ref 1: Source: A paraphrased excerpt from ‘Zaadul Maseer’ by Imaam Ibn Al-Jawzi (rahimahullaah). Publisher: Daar Ibn Hazm 1st edition 1423AH (Year 2002)]
[Ref 2: Source: A paraphrased excerpt from ‘Tayseer Al-Kareem Ar-Rahmaan Fee Tafseer Kalaam Al-Mannaan’ by Imaam Sadi (rahimahullaah). Publisher: Daar ibn Hazm 1st ed 1424AH (Year 2003)]