Narrated Abu Sa'id al-Khudri (RA):

The Prophet (ﷺ) said: "The whole earth is a mosque (to pray on) except a graveyard and a toilet." [Reported by at-Tirmidhi and it has an 'Illa (a defect)].

وَعَنْ أَبِي سَعِيدٍ ‏- رضى الله عنه ‏- عَنْ اَلنَّبِيِّ ‏- صلى الله عليه وسلم ‏-{ اَلْأَرْضُ كُلُّهَا مَسْجِدٌ إِلَّا اَلْمَقْبَرَةَ وَالْحَمَّامَ } رَوَاهُ اَلتِّرْمِذِيُّ , وَلَهُ عِلَّةٌ .‏ [1]‏ .‏