Genesis 49:2-4

New Catholic Bible

² “Gather and listen, sons of Jacob,
listen to Israel, your father.
³ “Reuben, you are the firstborn,
    my strength and the firstfruit of my might,
    excelling in dignity and excelling in power.
⁴ Unstable as water, you shall not have preeminence
    because you invaded your father’s bed
    and defiled my couch
    upon which you climbed.