Ziyad related to me from Malik from Abdullah ibn Dinar fromAbdullah ibn Umar that the Messenger of Allah, may Allah bless him andgrant him peace, said. "Search for Laylat al-Qadr in the last sevendays." (ES)
USC-MSA web (English) reference: Book 19, Hadith 12 (ES)
Arabic reference (ES): Book 19, Hadith 702 (ES)