﴿اللَّهُ لاَ إِلَهَ إِلاَّ هُوَ الْحَيُّ الْقَيُّومُ لاَ تَأْخُذُهُ سِنَةٌ وَلاَ نَوْمٌ لَّهُ مَا فِي السَّمَوَاتِ وَمَا فِي الأَرْضِ مَن ذَا الَّذِي يَشْفَعُ عِنْدَهُ إِلاَّ بِإِذْنِهِ يَعْلَمُ مَا بَيْنَ أَيْدِيهِمْ وَمَا خَلْفَهُمْ وَلاَ يُحِيطُونَ بِشَيْءٍ مِّنْ عِلْمِهِ إِلاَّ بِمَا شَاءَ وَسِعَ كُرْسِيُّهُ السَّمَوَاتِ وَالأَرْضَ وَلاَ يَؤُودُهُ حِفْظُهُمَا وَهُوَ الْعَلِيُّ الْعَظِيمُ﴾ عَقِبَ كلِّ صَلاَةٍ.
Allah! There is no god worthy of worship except Him, the Ever-Living, All-Sustaining. Neither drowsiness nor sleep overtakes Him. To Him belongs whatever is in the heavens and whatever is on the earth. Who could possibly intercede with Him without His permission? He fully knows what is ahead of them and what is behind them, but no one can grasp any of His knowledge—except what He wills to reveal. His Seat / Kursi encompasses the heavens and the earth, and the preservation of both does not tire Him. For He is the Most High, the Greatest. (Kursi: The Arabic word Kursi can either mean seat or knowledge. There are some narrations attributed to Prophet Muhammad (ﷺ) that describe Allah's Throne ('Arsh) as being greater than His Kursi.)
It is also from the Sunnah to recite Aayat ul-Kursee after each prayer:[Soorah al-Baqarah, Aayah 255] ; An-Nasa'i, 'Amalul-Yawm wal-Laylah (Hadith no. 100), also Ibn As-Sunni (no. 121). See also Al-Albani, Sahihul-Jami' As-Saghir 5/339 and Silsilatul-Ahadith As-Sahihah 2/697 (no. 972).