The Holy Quran 25:62 — Surah Al-Furqan
Arabic text
وَهُوَ ٱلَّذِى جَعَلَ ٱلَّيْلَ وَٱلنَّهَارَ خِلْفَةً لِّمَنْ أَرَادَ أَن يَذَّكَّرَ أَوْ أَرَادَ شُكُورًا
Translation
It is He Who has appointed the night and the day in succession for the one who intends to take heed (reflect) or who intends to be grateful. (It is such people who appreciate these favours of Allaah and use them in obedience to Him.)
Tafsir (excerpt) — Tafsir Usmani
waxing and waning, or coming and going, are called alternation; or the meaning is that He has made each a substitute for the other: for example, if a day's work was left undone, one did it at night; if a night's wird (regular devotion) was missed, one completed it during the day, کما ورد فی الحدیث (“as is reported in the hadith”).
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