مَنْ صَلَّى فِي اللَّيْلِ وَالنَّهَارِ ثِنْتَىْ عَشْرَةَ رَكْعَةً سِوَى الْمَكْتُوبَةِ بُنِيَ لَهُ بَيْتٌ فِي الْجَنَّةِ .
It was narrated that Umm Habibah said: "Whoever prays twelve rak'ahs during the night and day apart from the prescribed prayers, a house will be built for him in Paradise."