Surah Ar-Rum (The Romans), Verse 23

وَمِنْ اٰیٰتِهٖ مَنَامُكُمْ بِالَّیْلِ وَالنَّهَارِ وَابْتِغَآؤُكُمْ مِّنْ فَضْلِهٖ اِنَّ فِیْ ذٰلِكَ لَاٰیٰتٍ لِّقَوْمٍ یَّسْمَعُوْنَ ۟

Wa min Aayaatihee manaamukum bil laili wannahaari wabtighaaa'ukum min fadlih; inna fee zaalika la Aayaatil liqawminy yasma'oon

“And among His Signs is the sleep that ye take by night and by day, and the quest that ye (make for livelihood) out of His Bounty: verily in that are signs for those who hearken.”

Quran 30:23 (Yusuf Ali Translation)