I heard the Messenger of Allah ﷺ say, "Whoever prays twelve rakats in a day and a night will have a house built for him in Paradise because of them."
سمعت رسول الله ﷺ يقول: من صلى اثنتي عشرة ركعة في يوم وليلة بني له بهن بيت في الجنة.
Muslim narrated it in the Book of the Prayer of Travelers (728), from Muhammad bin Abdullah bin Numayr, who said, Abu Khalid (Sulayman bin Hayan) narrated to us, from Dawud bin Abu Hind, from Numan bin Salim, from Amr bin Aws, who said, Anbasah bin Abu Sufyan narrated to me, during his final illness in which he died, a hadith that people were hurrying to hear, saying, I heard Umm Habiba say... and he mentioned the hadith. Umm Habiba said, "I have not stopped doing them since I heard them from the Messenger of Allah ﷺ." Anbasah said, "I have not stopped doing them since I heard them from Umm Habiba." Amr bin Aws said, "I have not stopped doing them since I heard them from Anbasah." Numan bin Salim said, "I have not stopped doing them since I heard them from Amr bin Aws."In the narration of Bishr bin Mufaddal from Dawud, "Twelve prostrations voluntarily." And in the narration of Shubah from Numan bin Salim, "Other than the obligatory prayer."Abu Dawud (1250) likewise narrated it through the route of Ibn Ulaya, who said, Dawud bin Abu Hind narrated to us, similarly, without the details.Tirmidhi (415) narrated it from the hadith of Sufyan Thawri, from Abu Ishaq, from Musayab bin Rafi, from Anbasah bin Abu Sufyan, from her, giving the details, saying in his hadith, "Four before Dhuhr, two after it, two after Maghrib, two after Isha, and two before the Fajr prayer." Tirmidhi said, hasan sahih. I say, it is as he said, for although Abu Ishaq's memory became mixed up later in life, Sufyan Thawri and Shubah both narrated from him before that happened.Nasai (1803, 1804) narrated it in the same way, but he said, "and two before Asr" instead of "two after Isha." He narrated it through two routes, one through Fulayh bin Sulayman, from Suhayl bin Abu Salih, from Abu Ishaq, and the other through Abu Naeem, from Zuhayr, from Abu Ishaq. Nasai said, "Fulayh bin Sulayman is not strong." End of quote. He likewise narrated it through the route of Ibn Ajlan, from Abu Ishaq, from Amr bin Aws, from Anbasah bin Abu Sufyan, from her, similarly.I say, all of these who narrated from Abu Ishaq did so after his memory had become mixed up, so the mention of the two rakat before Asr in their narration is shadhdh (anomalous), even though this is established in other hadiths, as will come in the hadith of Ali bin Abu Talib.As for what is narrated from Abu Hurairah, who said, the Messenger of Allah ﷺ said, "Whoever prays twelve rakat in a day will have a house built for him in Paradise, two rakat before Fajr, two before Dhuhr, two after Dhuhr, and two, I think he said, before Asr, and two after Maghrib, I think he said, and two after the last Isha prayer." This is daif. Ibn Majah (1142) narrated it from Abu Bakr bin Abu Shayba (2/109, Lahham's edition), who said, Muhammad bin Sulayman Asbahani narrated to us, from Suhayl, from his father, from Abu Hurairah, and he related it.Nasai (1811) narrated it from Muhammad bin Abdullah bin Mubarak, who said, Yahya bin Ishaq narrated to us, Muhammad bin Sulayman narrated to us, with it, abridged in his wording, "Whoever prays twelve rakat in a day besides the obligatory prayer, Allah will build for him a house in Paradise." Nasai said, "This is an error, and Muhammad bin Sulayman is daif, he is Ibn Asbahani."Daraqutni was asked about this hadith and said, Fulayh bin Sulayman narrated it from Suhayl, from Abu Ishaq Sabi, from Musayab bin Rafi, from Anbasah bin Abu Sufyan, from Umm Habiba. Fulayh's version is closer to being correct. See Ilal (1500).