Deuteronomy 33:6

Revised Standard Version (RSV-CI)

“Let Reuben live, and not die, nor let his men be few.”

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While Israel dwelt in that land Reuben went and lay with Bilhah his father's concubine; and Israel heard of it. Now the sons of Jacob were twelve.

The sons of Leah: Reuben (Jacob's first-born), Simeon, Levi, Judah, Issachar, and Zebulun.

Judah, your brothers shall praise you; your hand shall be on the neck of your enemies; your father's sons shall bow down before you.

And these are the names of the men who shall attend you. From Reuben, Elizur the son of Shedeur;