Sunan Ibn Majah, Chapter: The Chapters on the Mosques and the Congregations

"Allah's Messenger (saw) 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 Kabah." (Daif) *It is possible that it means 'watering holes' that camels rest at. See Tuhfatul-Ahwadhi, and this is the meaning that Sindi preferred, he said: "It is where they kneel around water, because it is feared that the camels will flee and stampede through it, and perhaps that will lead to ruining the prayer." And this is the understanding that most commentaries endorse.