"The Messenger of Allah said: 'All the earth is a mosque, except for graveyards and Hammam.'"
Sunan Ibn Majah Book 4, Hadith 11
← Previous Hadith He said: "If it has been watered several times, then perform prayer there," and he attributed that to the Prophet.

Sunan Ibn Majah Book 4, Hadith 10 Next Hadith → "Allah's Messenger prohibited prayer from being performed in seven places: The garbage dump, the slaughtering area, the graveyard, the commonly used road, the bathroom, in the area that camels rest at, and above the Ka'bah."

Sunan Ibn Majah Book 4, Hadith 12