AYATUL KURSI (THE THRONE VERSE)

Ayatul Kursi () is the 255th verse of Suratul Baqarah (The Cow), the 2nd Surah in the Al-Quran.  It is a description of Allah's power over the whole universe.  It is thus widely recited and memorised - to some, as a remembrance and recognition of Allh's Greatness and to others, a belief that anyone who recites the verse enters the protection and security of God

اللَّهُ لاَ إِلَهَ إِلاَّ هُوَ الْحَيُّ الْقَيُّومُ لاَ تَأْخُذُهُ سِنَةٌ وَلاَ نَوْمٌ لَهُ مَا فِي السَّمَاوَاتِ وَمَا فِي الأَرْضِ مَنْ ذَا الَّذِي يَشْفَعُ عِنْدَهُ إِلاَّ بِإِذْنِهِ يَعْلَمُ مَا بَيْنَ أَيْدِيهِمْ وَمَا خَلْفَهُمْ وَلاَ يُحِيطُونَ بِشَيْءٍ مِنْ عِلْمِهِ إِلاَّ بِمَا شَاءَ وَسِعَ كُرْسِيُّهُ السَّمَاو ;َاتِ وَالأَرْضَ وَلاَ يَئُودُهُ حِفْظُهُمَا وَهُوَ الْعَلِيُّ الْعَظِيمُ

It is a long verse, so I'll try to break it down to its constituents:

اللَّهُ لاَ إِلَهَ إِلاَّ هُوَ الْحَيُّ الْقَيُّومُ
Allahu la ilaha illa Huwa, Al-Haiyul-Qaiyum
Allah! There is no god but He - the Living, The Self-subsisting, Eternal

لاَ تَأْخُذُهُ سِنَةٌ وَلاَ نَوْمٌ
La ta'khudhuhu sinatun wa la nawm
No slumber can seize Him Nor Sleep

لَهُ مَا فِي السَّمَاوَاتِ وَمَا فِي الأَرْضِ
lahu ma fis-samawati wa ma fil-'ard
His are all things In the heavens and on earth

مَنْ ذَا الَّذِي يَشْفَعُ عِنْدَهُ إِلاَّ بِإِذْنِهِ
Man dhal-ladhi yashfa'u 'indahu illa bi-idhnihi
Who is there can intercede In His presence except As he permitteth?

يَعْلَمُ مَا بَيْنَ أَيْدِيهِمْ وَمَا خَلْفَهُمْ وَلاَ يُحِيطُونَ بِشَيْءٍ مِنْ عِلْمِهِ إِلاَّ بِمَا شَاءَ
Ya'lamu ma baina aidihim wa ma khalfahum, wa la yuhituna bi shai'im-min 'ilmihi illa bima sha'a
He knoweth What (appeareth to His creatures As) Before or After or Behind them. Nor shall they compass Aught of his knowledge Except as He willeth

وَسِعَ كُرْسِيُّهُ السَّمَاو ;َاتِ وَالأَرْضَ وَلاَ يَئُودُهُ حِفْظُهُمَا وَهُوَ الْعَلِيُّ الْعَظِيمُ
Wasi'a kursiyuhus-samawati wal ard, wa la ya'uduhu hifdhuhuma Wa Huwal 'Aliyul-Adheem
His throne doth extend Over the heavens And on earth, and He feeleth No fatigue in guarding And preserving them, For He is the Most High. The Supreme (in glory)

Th above was adapted from http://www.islamawareness.net/Dua/kursi.html.