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. (Using translation from Muslim 1165e)
قَالَ رَسُولُ اللهِ ﷺ الْتَمِسُوهَا فِي الْعَشْرِ الْأَوَاخِرِ يَعْنِي لَيْلَةَ الْقَدْرِ فَإِنْ ضَعُفَ أَحَدُكُمْ أَوْ عَجَزَ فَلَا يُغْلَبَنَّ عَلَى السَّبْعِ الْبَوَاقِي