Genesis 49:5-7 (King James Version)
5 Simeon and Levi are brethren; instruments  of cruelty are in their habitations. 6 O my soul, come not thou into their secret; unto their assembly, mine honour, be not thou united: for in their anger they slew a man, and in their selfwill they digged down a wall. 7 Cursed be their anger, for it was fierce; and their wrath, for it was cruel: I will divide them in Jacob, and scatter them in Israel.
49:5 instruments...: or, their swords are weapons of violence