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

With the start of the last ten days of Ramadan, the Prophet ﷺ used to tighten his waist belt (i.e. work hard) and used to pray all the night, and used to keep his family awake for the prayers.  

كَانَ النَّبِيُّ ﷺ إِذَا دَخَلَ الْعَشْرُ شَدَّ مِئْزَرَهُ وَأَحْيَا لَيْلَهُ وَأَيْقَظَ أَهْلَهُ