Gen 49:5-7

5Simeon and Levi are brothers; weapons of violence are their swords.6May I never come into their council; may I not be joined to their company— for in their anger they killed men, and at their whim they hamstrung oxen.7Cursed be their anger, for it is fierce, and their wrath, for it is cruel! I will divide them in Jacob, and scatter them in Israel.