It is narrated from Sayyiduna Abu Musa al-Ash'ari (may Allah be pleased with him), as a marfu' report, that the Prophet (peace and blessings be upon him) said: "Whoever prays twelve rak'ahs (of the emphasised sunnah), Allah Almighty builds for him a house in Paradise."
Imam al-Tabarani (may Allah have mercy on him) said: "No one narrated this hadith from Abu Burdah except Harun Abu Ishaq; Hammad bin Zayd is alone in it, and this hadith is narrated from Abu Musa (may Allah be pleased with him) only with this chain."
Hadith Referenceالمعجم الأوسط / باب الهاء / 9436
Hadith Takhrij«أخرجه أحمد فى «مسنده» برقم: 20023، والبزار فى «مسنده» برقم: 3197 / 2، 3197 / 1»