Targum Jonathan on Deuteronomy
Let Reuben live in this world, nor die the second death which the wicked die in the world to come; and let his youths be numbered with the young men of his brethren of Beth Israel.
Targum Jerusalem
Let Reuben live in this world, nor die the second death which the wicked the in the world to come; and let his youths be with the men in number.