. [If there were] three brothers, [and] two of them were married to two sisters, while one was married to a stranger; [if] the husband of one of the sisters died, and the one married to the stranger married his wife, and the wife of the second one [then] died, and then the one married to the stranger died —- she is forbidden to him forever, since she was once forbidden to him.  [If there were] three brothers, [and] two of them were married to two sisters, while one was married to a stranger; [if] the husband of one of the sisters divorced his wife, and [then] the one [who was] married to the stranger died, and the divorced [brother] married her and [then] died —- about this it was said: If any of them died or were divorced, their co-wives are permitted.