Midrasch zu Jeschijahu 11:7

Similarly, Judah will also be Esau’s adversary, as it is stated: And the lion shall eat straw like the ox (Isa. 11:7). Lion refers to Judah, as is said: Judah is a lion’s whelp (Gen. 49:9), and like the ox alludes to Joseph. Will eat straw informs us that Joseph will judge Esau, who is referred to as straw, and his descendants will be like straw, as it is said: And the house of Esau is like straw (Obad. 18).¹The two tribes, identified as animals, will consume the straw representing Esau. Whence do we know that all the others will likewise judge Esau? From the verse How was thy mother a lioness; among lions she couched (Ezek. 19:2). We learn (from this verse) that all Israel will judge Esau.