Musnad Ahmad 30:3332

Hajjaj and Muhammad ibn Ja'far narrated to us, they said: Shu'bah narrated to us, from Mansur—Shu'bah said: He wrote it to me and I read it to him—from Abu 'Uthman, the freed slave of Al-Mughirah ibn Shu'bah, from Abu Hurayrah. 'Abdullah said: My father said, and he did not attribute it to the Prophet (marfu'): He said: "There is no Muslim servant who prays twelve voluntary rak'ahs in a day, except that a house is built for him in Paradise." Al-Hakam narrated to us, he said: 'Abdullah—and I heard it from Al-Hakam ibn Musa—narrated to us, 'Isa ibn Yunus narrated to us, Hisham ibn Hassan narrated to us, from Muhammad ibn Sirin, from Abu Hurayrah, he said: The Messenger of Allah (peace and blessings of Allah be upon him) said: "Whoever is overcome by vomiting, there is no making up (qada') upon him, and whoever induces vomiting, let him make it up."