[Machine] I asked the Messenger of Allah ﷺ as you asked me, and he said: "If you pray Duha two units, you will not be written among the heedless. And if you pray it four units, you will be written among the good-doers. And if you pray it six units, you will be written among the devout. And if you pray it eight units, you will be written among the successful. And if you pray it ten units, that day no sin will be written against you. And if you pray twelve units, Allah will build for you a house in Paradise." And it has been narrated from another narrator, Abdullah bin Umar, and from Abu Dharr, and we have mentioned it in the book of Al-Jami'.  

سَأَلْتُ رَسُولَ اللهِ ﷺ كَمَا سَأَلْتَنِي فَقَالَ إِنْ صَلَّيْتَ الضُّحَى رَكْعَتَيْنِ لَمْ تُكْتَبْ مِنَ الْغَافِلِينَ وَإِنْ صَلَّيْتَهَا أَرْبَعًا كُتَبْتَ مِنَ الْمُحْسِنِينَ وَإِنْ صَلَّيْتَهَا سِتًّا كُتَبْتَ مِنَ الْقَانِتِينَ وَإِنْ صَلَّيْتَهَا ثَمَانِيًا كُتَبْتَ مِنَ الْفَائِزِينَ وَإِنْ صَلَّيْتَهَا عَشْرًا لَمْ يُكْتَبْ لَكَ ذَلِكَ الْيَوْمَ ذَنْبٌ وَإِنْ صَلَّيْتَهَا ثِنْتَيْ عَشْرَةَ رَكْعَةً بَنَى اللهُ لَكَ بَيْتًا فِي الْجَنَّةِ وَقَدْ رُوِيَ مِنْ وَجْهٍ آخَرَ عَنْ عَبْدِ اللهِ بْنِ عُمَرَ وَعَنْ أَبِي ذَرٍّ وَقَدْ ذَكَرْنَاهُ فِي كِتَابِ الْجَامِعِ