الفرقان — Al-Furqan Ayat 62

وَهُوَ الَّذِيْ جَعَلَ الَّيْلَ وَالنَّهَارَ خِلْفَةً لِّمَنْ اَرَادَ اَنْ يَّذَّكَّرَ اَوْ اَرَادَ شُكُوْرًا

Wa huwal-lażī ja‘alal-laila wan-nahāra khilfatal liman arāda ay yażżakkara au arāda syukūrā(n).

"And it is He who has made the night and the day in succession for whoever desires to remember or desires gratitude."