BERESHIS 49

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 fatherʼs bed, i.e. incest);

then defiledst thou it;

he went up to my couch.