Allah Ta’ala says in the Holy Quran:
“ Indeed, We sent the Qur’an down during the Night of Decree. And what can make you know what is the Night of Decree? The Night of Decree is better than a thousand months. The angels and the Spirit descend therein by permission of their Lord for every matter. Peace it is until the emergence of dawn.”
[Quran 97:1-5]
Abu Huraira reported Allah’s Messenger (ﷺ) as saying:
He who observed the fasts of Ramadan with faith and seeking reward (from Allah), all his previous sins would be forgiven, and he who observed prayer on Lailat-ul- Qadr with faith and seeking reward (from Allah), all his previous sins would be forgiven.
[Sahih Muslim Book 6, Hadith 209]
Aisha (May Allah be pleased with her) reported: With the start of the last ten days of Ramadan, the Prophet (Salalaahu Alaihi Wasalam) used to tighten his waist belt (i.e. work harder) and used to pray the whole night, and used to keep his family awake for the prayers. [Bukhari]
Ibn Umar (Allah be pleased with them) reported Allah’s Messenger (ﷺ) as saying:
Seek it (Lailat-ul-Qadr) in the last (ten nights). If one among you shows slackness and weakness (in the earlier part of Ramadan), it should not be allowed to prevail upon him in the last week.
[Sahih Muslim Book 13, Hadith 271]
‘Aishah (May Allah be pleased with her) reported:
I asked: “O Messenger of Allah! If I realize Lailat-ul-Qadr (Night of Decree), what should I supplicate in it?” He (ﷺ) replied, “You should supplicate: Allahumma innaka ‘afuwwun, tuhibbul-‘afwa, fa’fu ‘anni (O Allah, You are Most Forgiving, and You love forgiveness; so forgive me).”
[At-Tirmidhi]
The Prophet ﷺ said
“The month of Ramadan has come, a blessed month in which Allah Almighty has obligated you to fast. In it the gates of the heavens are opened, and in it the gates of Hellfire are closed, and in it the devils are chained, and in it is a night that is better than a thousand months. Thus, whoever is deprived of its good is truly deprived .”[Musnad Aḥmad | 7108]
Salim reported on the authority of his father that a person saw Lailat-ul- Qadr on the 27th (of Ramadan). Thereupon Allah’s Apostle (ﷺ) said:
I see that your dreams agree regarding the last ten (nights of Ramadan). So seek it on an odd number (of these ten nights).
[Sahih Muslim Book 13, Hadith 269]
‘A’isha (Allah be pleased with her) and Ibn Numair reported Allah’s Messenger (ﷺ) as saying:
Look for Lailat-ul-Qadr in the last ten nights of Ramadan.
[Sahih Muslim Book 13, Hadith 282]