'A'isha (Allah be pleased with her) reported that Messenger of Allah ﷺ used to exert himself in devotion during the last ten nights to a greater extent than at any other time.
عَائِشَةُ ؓ كَانَ رَسُولُ اللَّهِ ﷺ يَجْتَهِدُ فِي الْعَشْرِ الأَوَاخِرِ مَا لاَ يَجْتَهِدُ فِي غَيْرِهِ