Chapter: The virtue of Lailat Al-Qadr and the Exhortation to seek it; When it is and the most likely times to seek it
Ibn Umar (Allah be pleased with them) reported Allah's Messenger ( صلی اللہ علیہ وسلم ) as saying: He who is anxious to seek it (Lailat-ul-Qadr) should seek it in the last ten (nights of Ramadan).
Authentic