One wolf is not an unavoidable accident; two wolves is an unavoidable accident. R’ Yehudah says: At a time when wolves are sent out, even one wolf is an unavoidable accident. Two dogs is not an unavoidable accident. Yaddua the Babylonian says in the name of R’ Meir: From one direction, it is not an unavoidable accident; from two directions, it is an unavoidable accident. A brigand is an unavoidable accident. A lion, a bear, a leopard, a bardelas, or a snake is an unavoidable accident. When? When they came of themselves. But if he led them to a place [frequented by] bands of beasts or brigands, it is not an unavoidable accident.