﴿ وَهُوَ ٱلَّذِى جَعَلَ ٱلَّيْلَ وَٱلنَّهَارَ خِلْفَةًۭ لِّمَنْ أَرَادَ أَن يَذَّكَّرَ أَوْ أَرَادَ شُكُورًۭا ﴾

“And He it is who causes the night and the day to succeed one another, [revealing Himself in His works] unto him who has the will to take thought - that is has the will to be grateful.”

(And He it is Who hath appointed night and day in succession) to each other, (for him who desireth to remember) to take admonition in their succession, (or desireth thankfulness) or desires to do righteous works, whatever he left undone at night he does it during the day, and whatever he left undone during the day he does it at night.