١٧ : ١٢
وَجَعَلۡنَا ٱلَّيۡلَ وَٱلنَّهَارَ ءَايَتَيۡنِۖ فَمَحَوۡنَآ ءَايَةَ ٱلَّيۡلِ وَجَعَلۡنَآ ءَايَةَ ٱلنَّهَارِ مُبۡصِرَةٗ لِّتَبۡتَغُواْ فَضۡلٗا مِّن رَّبِّكُمۡ وَلِتَعۡلَمُواْ عَدَدَ ٱلسِّنِينَ وَٱلۡحِسَابَۚ وَكُلَّ شَيۡءٖ فَصَّلۡنَٰهُ تَفۡصِيلٗا
We have made the day and night as two signs. We darkened the night and made the day bright, so that you may seek your Lord’s bounty and know the number of years and calculation [of time]. And We have expounded everything in detail.