Genesis 49:1-3

ASV(i) 1 And Jacob called unto his sons, and said: Gather yourselves together, that I may tell you that which shall befall you in the latter days. 2 Assemble yourselves, and hear, ye sons of Jacob;
And hearken unto Israel your father.
3 Reuben, thou art my first-born, my might, and the beginning of my strength;
The pre-eminence of dignity, and the pre-eminence of power.