(3) باب أَيْنَ يَجُوزُ بِنَاءُ الْمَسَاجِدِ
It was narrated that Ibn 'Umar was asked about gardens in which excrement was thrown.:
He said: "If it has been watered several times, then perform prayer there," and he attributed that to the Prophet. (ID)
Reference (ID): Sunan Ibn Majah 744 (ID)
In-book reference (ID): Book 4, Hadith 10 (ID)
English translation (ID): Vol. 1, Book 4, Hadith 744 (ID)