(66) باب ثَوَابِ مَنْ صَلَّى فِي الْيَوْمِ وَاللَّيْلَةِ ثِنْتَىْ عَشْرَةَ رَكْعَةً سِوَى الْمَكْتُوبَةِ وَذِكْرِ اخْتِلاَفِ النَّاقِلِينَ فِيهِ لِخَبَرِ أُمِّ حَبِيبَةَ فِي ذَلِكَ وَالاِخْتِلاَفِ عَلَى عَطَاءٍ
It was narrated that Umm Habibah said:
"Whoever prays twelve rak'ahs during the night and day other than the prescribed prayers, a house will be built for him in Paradise: four before Zuhr and two rak'ahs afterward, two before Asr, two after Maghrib and two before Fajr."
Reference: Sunan an-Nasa'i 1803
In-book reference: Book 20, Hadith 206
English translation: Vol. 2, Book 20, Hadith 1804