مِشْكَاةُ الْمَصَابِيحِ
Mishkat al-Masabih 737
Prayer
Mosques and places of Prayer - Section 2
وَعَنْ أَبِي سَعِيدٍ قَالَ: قَالَ رَسُولُ اللَّهِ صَلَّى اللَّهُ عَلَيْهِ وَسَلَّمَ: «الْأَرْضُ كُلُّهَا مَسْجِدٌ إِلَّا الْمَقْبَرَةَ وَالْحَمَّامَ» . رَوَاهُ أَبُو دَاوُدَ وَالتِّرْمِذِيُّ والدارمي
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.
Mishkat al-Masabih, 737صَحِيحٌ (الألباني)