Midrasch zu Jirmejahu 50:45

..[With regard to] this did [Jeremiah] say to have it written, 'Surely the shepherd boys will drag away [the evil ones, Edom or Babylonia in defeat].' (Jeremiah 49:20, 50:45) Rabbi Samuel son of Nachmani said, 'We have a tradition in our hands that Esau [i.e., evildoers, identified with Esau, Edom, and Babylonia] will not fall except into the hands of [the tribal descendants of] Rachel's children [i.e., Joseph or Benjamin]. Why? Because if the [other] tribes were to bring suit against Esau, saying, 'Why did you pursue your brother [our ancestor Israel to harm him (see e.g., Genesis 27:41)]? [We, Israel, have a claim against you for this!]' Then he [Esau can] say to them, 'Why did you pursue your brother Joseph [to harm him]? You are no better than I!' But if Joseph should come to him and say, 'Why did you pursue your brother?', he [Esau] will have no answer. For if Esau were to say '[I pursued him] because he did me evil!' [Joseph could reply,] 'My brothers also requited me with evil, and I requited them with good!' Immediately he [Esau would have to] be silent. And about this is it written, 'See, they are become like straw, Fire consumes them; They cannot save themselves From the power of the flame . . .' (Isaiah 47:14). 'Behold, they are become like straw' -- this refers to Esau . . . [Translation incomplete]