Narrated Maimuma (rad):

Allah’s Messenger (ﷺ) poured water over his private parts and washed them with his left hand. He then struck his hand against the earth.

وَلَهُمَا فِي حَدِيثِ مَيْمُونَةَ: { ثُمَّ أَفْرَغَ عَلَى فَرْجِهِ, فَغَسَلَهُ بِشِمَالِهِ, ثُمَّ ضَرَبَ بِهَا اَلْأَرْضَ }