|In the Name of Allah, the Most Gracious, the Most Merciful,|
Imaam Ahmad recorded that Abu Hurayrah said, “When Ramadan would come, the Messenger of Allaah (صلّى الله عليه وآله وسلّم) would say,
“Verily, the month of Ramadaan has come to you all. It is a blessed month, which Allaah 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.” (Ahmad 2:230. There is a witness for this narration from the Hadeeth of Anas bin Maalik in the books of the Sunan.)
An-Nasaa’ee recorded this same Hadeeth. 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 Saheehs from Abu Hurayrah that the Messenger of Allaah (sallallaahu alayhi wa sallam) said,
“Whoever stands (in prayer) during the Night of Al-Qadr with faith and expecting reward (from Allaah), he will be forgiven for his previous sins.”
Allaah (SWT) says in the Quran:
تَنَزَّلُ الْمَلَائِكَةُ وَالرُّوحُ فِيهَا بِإِذْنِ رَبِّهِم مِّن كُلِّ أَمْرٍ
“Therein descend the angels and the Ruh by their Lord’s permission with every matter.” (Surah Al Qadr 97:4)
Meaning, the angels descend in abundance during the Night of Al-Qadr due to its abundant blessings.
Allaah (SWT) also says in the Quran:
سَلَامٌ هِيَ حَتَّىٰ مَطْلَعِ الْفَجْرِ
“There is peace until the appearance of the dawn.” (Surah Al Qadr 97:5)
Sa’eed bin Masoor said, “Hushaym narrated to us on the authority of Abu Ishaaq, who narrated that Ash-Sha’bi said concerning Allaah’s statement:
“With every matter, there is a peace until the appearance of dawn.”
The angels are giving the greetings of peace during the Night of Al-Qadr to the people in the Masaajid until the coming of Fajr (dawn).
Source: Tafseer Ibn Kathir