The reality of Laylatul Qadr.
Laylat al-Qadr or Shab al-Qadr is one of the odd nights (21st, 23rd, 25th, 27th and 29th) of the last ten days of the Islamic month of Ramadan, about which a Surah named Surah al-Qadr was revealed in the Holy Quran. There is a great virtue and emphasis on worshipping on this night. The Quran has declared the worship of this night better than a thousand months. In this calculation, the worship of this night is 83 years and 4 months.
The Messenger of Allah (peace and blessings of Allah be upon him) said that a man among the Children of Israel said that the Muslims were jealous of Allah's guidance for a thousand thousand years, so Allah gave him this night in return.
Some narrations state that the Prophet (peace be upon him) saw that the lifespans of the previous nations were very long, while the lifespans of his nation were short. If he wanted to equal them in good deeds, it would be impossible. The Prophet (peace be upon him) felt sad about this, so Allah granted him this night in return.