It was narrated that 'Ubadah bin Samit said:
"The Messenger of Allah (ﷺ) ruled that there is no liability for injuries caused by falling into a mines or a well, nor those caused by a beast." (ES)
English reference (ES): Vol. 3, Book 21, Hadith 2675 (ES)
Arabic reference (ES): Book 21, Hadith 2777 (ES)