5. The Book of Mosques and Places of Prayer
٥۔ كتاب الْمَسَاجِدِ وَمَوَاضِعِ الصَّلاَةِ
The Prophet ﷺ talked about a man leveling the earth on prostrating, and said, "If you have to do so, then do it once."
أَنَّ النَّبِيَّ ﷺ قَالَ فِي الرَّجُلِ يُسَوِّي التُّرَابَ حَيْثُ يَسْجُدُ قَالَ إِنْ كُنْتَ فَاعِلاً فَوَاحِدَةً