There are knots for which we are not liable as [we are for] the camel drivers’ knot and the sailor’ knot. A woman may tie the opening of her chemise; strings of a hair net or of a girdle; straps of a shoe or a sandal; [leather] canteens of wine or oil; or a pot of meat. R’ Eliezer ben Yaakov says: We may tie [a rope] in front of an animal in order that it not go out.  We may tie a pail with a belt but not with a rope. [But] R’ Yehudah permits [it]. R’ Yehudah stated a general rule: Any knot which is not permanent, we are not liable for.