Ziyad related to me from Malik from Nafi from Ibn 'Umar thatsome of the companions of the Messenger of Allah, may Allah bless himand grant him peace, were shown Laylat al-Qadr in their sleep duringthe last seven days. The Messenger of Allah, may Allah bless him andgrant him peace, said, "I see that your visions agree about the lastseven days, so whoever is searching for it should do so in the lastseven days."
USC-MSA web (English) reference: Book 19, Hadith 15
Arabic reference: Book 19, Hadith 705