97. Surah Al-Qadr (The Night of Decree)

In the Name of Allah, the Most Beneficent, the Most Merciful 

2. And what will make you know what the night of Al-Qadr (Decree) is?

3. The night of Al-Qadr (Decree) is better than a thousand months (i.e. worshipping Allah in that night is better than worshipping Him a thousand months, i.e. 83 years and 4 months).

4. Therein descend the angels and the Ruh [Jibrael (Gabriel)] by Allah's Permission with all Decrees,

5. Peace! (All that night, there is Peace and Goodness from Allah to His believing slaves) until the appearance of dawn.