question #1 Sahih Muslim 1165e, Book 13, Hadith 271 : What is the significance of seeking Lailat-ul-Qadr during the last ten nights of Ramadan?

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.