"The Messenger of Allah ﷺ said: 'Whoever has the habit of praying at night but he sleeps and misses it, that is a charity that Allah (SWT) has given to him, and the reward of his prayer will be recorded for him.'"  

قَالَ رَسُولُ اللَّهِ ﷺ مَنْ كَانَتْ لَهُ صَلاَةٌ صَلاَّهَا مِنَ اللَّيْلِ فَنَامَ عَنْهَا كَانَ ذَلِكَ صَدَقَةً تَصَدَّقَ اللَّهُ ﷻ عَلَيْهِ وَكَتَبَ لَهُ أَجْرَ صَلاَتِهِ  

The Messenger of Allah ﷺ said: and he mentioned something similar.  

أَنَّ رَسُولَ اللَّهِ ﷺ قَالَ فَذَكَرَ نَحْوَهُ قَالَ أَبُو عَبْدِ الرَّحْمَنِ أَبُو جَعْفَرٍ الرَّازِيُّ لَيْسَ بِالْقَوِيِّ فِي الْحَدِيثِ