One Thousand and One Nights 
Story of the Second Old Man, and of the Two Black Dogs 

An old man explains that his two black dogs are really his two brothers, whom he repeatedly saved from poverty. When he married a beautiful woman, however, all his kindnesses were forgotten, and his brothers tried to kill them. Yet the merchant’s wife was not what she seemed, as the murderous brothers would soon find out. A story of brotherly love betrayed and revenged, "The Story of the Second Old Man, and of the Two Black Dogs" is the fourth of 34 tales in the classic "Arabian Nights" collection translated by Andrew Lang.-