Ziyad related to me from Malik from Hisham ibn Urwa from his father that the Messenger of Allah ﷺ said, "Search for Laylat al-Qadr in the last ten days of Ramadan."

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ تَحَرَّوْا لَيْلَةَ الْقَدْرِ فِي الْعَشْرِ الأَوَاخِرِ مِنْ رَمَضَانَ