Reuben: Loss of Primacy

Genesis 49:3-4

Reuben mine eldest sonne, thou art my might, and the beginning of my strength, the excellencie of dignitie, and the excellencie of power:

Thou wast light as water: thou shalt not be excellent, because thou wentest vp to thy fathers bed: then diddest thou defile my bed, thy dignitie is gone.