Allah, the Exalted, says:
[b]"Verily, We have sent it (this Qur'an) down in the Night of Al-Qadr (Decree). And what will make you know what the Night of Al-Qadr (Decree) is? 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). Therein descend the angels and the Ruh [Jibril (Gabriel)] by Allah's Permission with all Decrees. (All that night), there is peac....