Al-Qadr Verse 3

The Night of Glory is better than a thousand months.

The Night of Decree is better than a thousand months.

The Night of Power is better than a thousand months;

The Night of Glory is better than a thousand months;

The night of Power is better than a thousand months.

The Night of Power is better than a thousand months.

The Night of Power is better than a thousand months.

Better is the Night of Determination than a thousand months.

The Night of Destiny is better than a thousand months.

The Night of Ordainment is better than a thousand months.

The Night of Destiny and Power is better than a thousand months.

The Night of Majesty is better than a thousand months.

The predestined/destiny night (is) better than one thousand month (lunar months).

The Night of Destiny is better than a thousand months.

The Night of Power is better than a thousand months!

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).

The angels and the Spirit descend in it by the permission of their Lord -- for every affair --

The grand night is better than a thousand months.

The Night of Power is better than a thousand months.

(Worship) on the Night of Destiny is better than (worship) for a thousand months.

The Night of Honor is better than a thousand months,

The Night of Al-Qadr is better than a thousand months.

The Night of Destiny is better than a thousand months;

The Night of Decree is better than a thousand months.

The Night of Ordainment is better than a thousand months, in which there is no Night of Ordainment, for a righteous deed on that Night is better than one [performed] for a thousand months without it.

And what will make you know what the Night of Al-Qadr is?

The Night of Al-Qadr is better than a thousand months.

Imam Ahmad recorded that Abu Hurayrah "When Ramadan would come, the Messenger of Allah would say,

قَدْ جَاءَكُمْ شَهْرُ رَمَضَانَ شَهْرٌ مُبَارَكٌ افْتَرَضَ اللهُ عَلَيْكُمْ صِيَامَهُ

تُفْتَحُ فِيهِ أَبْوَابُ الْجَنَّةِ وَتُغْلَقُ فِيهِ أَبْوَابُ الْجَحِيمِ وَتُغَلُّ فِيهِ الشَّيَاطِينُ

فِيهِ لَيْلَةٌ خَيْرٌ مِنْ أَلْفِ شَهْرٍ مَنْ حُرِمَ خَيْرَهَا فَقَدْ حُرِم

Verily, the month of Ramadan has come to you all. It is a blessed month, which Allah has obligated you all to fast.

During it the gates of Paradise are opened, the gates of Hell are closed and the devils are shackled.

In it there is a night that is better than one thousand months. Whoever is deprived of its good, then he has truly been deprived."

An-Nasa'i recorded this same Hadith.

Aside from the fact that worship during the Night of Al-Qadr is equivalent to worship performed for a period of one thousand months, it is also confirmed in the Two Sahihs from Abu Hurayrah that the Messenger of Allah said,

مَنْ قَامَ لَيْلَةَ الْقَدْرِ إِيمَانًا وَاحْتِسَابًا غُفِرَ لَهُ مَا تَقَدَّمَ مِنْ ذَنْبِه

Whoever stands (in prayer) during the Night of Al-Qadr with faith and expecting reward (from Allah), he will be forgiven for his previous sins.
The Descent of the Angels and the Decree for Every Good during the Night of Al-Qadr

Allah says,

تَنَزَّلُ الْمَلَيِكَةُ وَالرُّوحُ فِيهَا بِإِذْنِ رَبِّهِم مِّن كُلِّ أَمْرٍ