Bereshis 49:3-5 Orthodox Jewish Bible (OJB)
3 Reuven, thou art my bechor, my koach, and the reshit of my strength, the excellency of honor, and excellency of oz (power):
4 Unstable as mayim, thou shalt not excel; because thou wentest up to mishkevei avicha (thy father’s bed, i.e. incest); then defiledst thou it; he went up to my couch.
5 Shimon and Levi are achim; kelei chamas (instruments of violence) are in their swords.