وَعَنْ عَائِشَةَ رَضِيَ اللَّهُ عَنْهَا قَالَتْ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «تَحَرَّوْا لَيْلَةَ الْقَدْرِ فِي الْوِتْرِ مِنَ الْعَشْرِ الْأَوَاخِرِ من رَمَضَان» . رَوَاهُ البُخَارِيّ

Ibn ‘Umar said that some of the Prophet’s companions had a dream that lailat al-qadr was among the last seven nights, so God’s messenger said, “ I see that your dreams agree regarding the last seven nights, so if anyone seeks it he should do so during the last seven nights.”(Bukhari and Muslim.)