Musannaf Ibn Abi Shayba 1:1843

Abu Bakr narrated to us, he said: Ibn Fudayl narrated to us, from Ash'ath, who said: I asked Ibn Sirin about a man who urinates in his house in which he prays, and he disliked it. And I asked al-Hasan, and he said: Yes, and he should not leave it.