وَحَدَّثَنِي زِيَادٌ، عَنْ مَالِكٍ، عَنْ عَبْدِ اللَّهِ بْنِ دِينَارٍ، عَنْ عَبْدِ اللَّهِ بْنِ عُمَرَ، أَنَّ رَسُولَ اللَّهِ صلى الله عليه وسلم قَالَ ‏"‏ تَحَرَّوْا لَيْلَةَ الْقَدْرِ فِي السَّبْعِ الأَوَاخِرِ ‏"‏ ‏.‏

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." Translation Not Available

Book Ref: Muwatta Imam Malik Book 19 Hadith 702
Web Ref:  Muwatta Imam Malik Book 19 Hadith 12