Yahya bin Ayoub al-Ghafiqi يحيى بن أيوب الغافقي · The Book on Salat (Prayer)

"The Prophet prohibited Salat from being performed in seven places: the dung heap, the slaughtering area, the graveyard, the commonly used road, the wash area, in the area that camels rest at, and above the House of Allah (the Ka'bah)."