Bulugh al-Maram, Book 1, Hadith 145 (In-Book) ⓘ
Narrated Maimuma (rad): Allah’s Messenger 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 }
also referenced under: Book 1, Hadith 129 (English)