REUBEN LOST HIS STATUS BECAUSE OF SEXUAL SIN

Genesis 35:22 And it came to pass, when Israel dwelt in that land, that Reuben went and lay with Bilhah his father's concubine: and Israel heard it …

Genesis 49:3 Reuben, thou art my firstborn, my might, and the beginning of my strength, the excellency of dignity, and the excellency of power:

Genesis 49:4 Unstable as water, you shall not excel; because you went up to your father's bed; then defiledst thou it: he went up to my couch.