ayaat-ul-kursi

اللّهُ لاَ إِلَـهَ إِلاَّ هُوَ الْحَيُّ الْقَيُّومُ لاَ تَأْخُذُهُ سِنَةٌ وَلاَ نَوْمٌ لَّهُ مَا فِي السَّمَاوَاتِ وَمَا فِي الْأَرْضِ مَن ذَا الَّذِي يَشْفَعُ عِندَهُ إِلاَّ بِإِذْنِهِ يَعْلَمُ مَا بَيْنَ أَيْدِيهِمْ وَمَا خَلْفَهُمْ وَلاَ يُحِيطُونَ بِشَيْءٍ مِّنْ عِلْمِهِ إِلاَّ بِمَا شَاءَ وَسِعَ كُرْسِيُّهُ السَّمَاوَاتِ وَالْأَرْضَ وَلاَ يَئُودُهُ حِفْظُهُمَا وَهُوَ الْعَلِيُّ الْعَظِيمُ

Allah! There is no ilah (deity worthy of worship) but He The Living, The Eternal One. Neither slumber, nor sleep overtakes Him. To Him belonges whatever is in the Heavens and on the earth. Who is he that can intercede with Him but by His permission? He knows what is before and what is behind them. They encompass nothing of His knowledge which He will. His Throne extends over the Heavens and the Earth, and the preservation of both does not weary Him. He is the Exalted The Immense One.

(Qur'an 2:255)