The Prophet ﷺ had heightened devotion during the final ten nights of Ramadan

'A'isha (Allah be pleased with her) reported that when the last ten nights began Messenger of Allah ﷺ kept awake at night (for prayer and devotion), wakened his family, and prepared himself to observe prayer (with more vigour).  

كَانَ رَسُولُ اللَّهِ ﷺ إِذَا دَخَلَ الْعَشْرُ أَحْيَا اللَّيْلَ وَأَيْقَظَ أَهْلَهُ وَجَدَّ وَشَدَّ الْمِئْزَرَ  

'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