[Machine] I heard the Messenger of Allah ﷺ say, "Whoever prays twelve voluntary Rak'ahs every day, besides the obligatory prayers, a house will be built for him in Paradise." (492) And from Humaid bin Mas'adah, from Bishr bin Al-Mufaddal, from Dawud bin Abi Hind, from Nu'man bin Salim through the same chain.  

سَمِعْتُ رَسُولَ اللهِ ﷺ يَقُولُ «مَنْ صَلَّى كُلَّ يَوْمٍ ثِنْتَيْ عَشْرَةَ رَكْعَةً تَطَوُّعًا مِنْ غَيْرِ فَرِيضَةٍ بُنِيَ لَهُ بَيْتٌ فِي الْجَنَّةِ» 492 وَعَنْ حُمَيْدِ بْنِ مَسْعَدَةَ عَنْ بِشْرِ بْنِ الْمُفَضَّلِ عَنْ دَاوُدَ بْنِ أَبِي هِنْدٍ عَنِ النُّعْمَانِ بْنِ سَالِمٍ بِهِ  

"I came to At-Ta'if and entered upon Anbasah bin Abi Sufyan when he was dying. I saw that he was afraid so I said: 'You will be fine.' He said: 'My sister Umm Habibah told me that the Messenger of Allah ﷺ said: Whoever prays twelve rak'ahs by day or by night, Allah, the Mighty and Sublime, will build for him a house in Paradise.'" (Using translation from Nasāʾī 1799)   

أَنَّ رَسُولَ اللهِ ﷺ قَالَ «مَنْ صَلَّى اثْنَتَيْ عَشْرَةَ رَكْعَةً نَافِلَةً بِالنَّهَارِ أَوْ بِاللَّيْلِ بُنِيَ لَهُ بَيْتٌ فِي الْجَنَّةِ»