Lailatul-Qadr, or the Night of Power, is the anniversary of the night that the Quran was sent down from the Preserved Tablet to the lowest heaven. It is also the night that the Angel Jibra'il (PBUH) appeared to the Prophet saw in the cave with the first revelation of the Quran (al-Alaq 96:1-5). Allah created 7 heavens or 'layers of space', and according to hadith, the entire Quran came down at once to the lowest heaven, from the Preserved Tablet where everything which will happen from the beginning of time until the Last Day is written.
The Night of Power falls on one of the odd-numbered nights of the last ten days of the month of Ramadhan (the 21st, 23rd, 25th 27th or 29th). During these last 10 days the Prophet saw and his Companions used to spend all of their time in the masjid in seclusion (i'tikaf), praying and reading the Quran, and waiting for the special night on which the angels come down to earth with Allah's commands.
It is said that if a person is awake on this night and asks Allah for anything, He will give it to him. It is a time of great peace and satisfaction. Why does not Allah tell us exactly which night it is? Perhaps He wants us to make an effort for it; people appreciate things more when they have to struggle to win them.
See also Surah ad-Dukhan (44:1-2)
Surah Makki(5 verses)
Surah al- Qadr (The Power)
In the name of Allah, the Kindest and Most Merciful One..
1. Surely We sent it down on the Night of Power.2. And what can make you understand what the Night of Power is?3. The Night of Power is better than a thousand months!4. In it the angels and the Spirits come down by the permission of their Lord, with all the commands.
5. It is Peace! ... until the break of dawn.
ii)http://www.quranexplorer.com/quran/ , go to Surah al- Qadr
iv) The Meanings of the Noble Quran with explanatory notes(pg 1184) by Mufti Muhammad Taqi Usmani (Maktaba Ma'ariful Quran - Quranic Studies Publishers, Karachi, Pakistan)
Video recitation by Mishary Rashed al Efasy at --> http://www.youtube.com/watch?v=Fte0o2BPL-Q