ENOfficial
Abu Sa'id reported God’s Messenger as saying, “The whole earth is a mosque, with the exception of a graveyard and a bath.” Abu Dawud, Tirmidhi and Darimi transmitted it.
Source: sunnah.com
Other translations
Arabic
وَعَنْ أَبِي سَعِيدٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «الْأَرْضُ كُلُّهَا مَسْجِدٌ إِلَّا الْمَقْبَرَةَ وَالْحَمَّامَ» . رَوَاهُ أَبُو دَاوُدَ وَالتِّرْمِذِيُّ والدارمي
sunnah.com