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