Littérature du Second Temple sur Le Deutéronome 33:6

יְחִ֥י רְאוּבֵ֖ן וְאַל־יָמֹ֑ת וִיהִ֥י מְתָ֖יו מִסְפָּֽר׃ (ס)

"Que Ruben vive et soit immortel; que sa population soit innombrable!

On the Change of Names

[210] and while Abraham prays, as we have said, that the grace of hearkening to holy words and learning holy truths may live, Jacob, the Man of Practice, prays for the life of natural goodness, for he says “Let Reuben live and not die” (Deut. 33:6).  Is he here praying that he should never know death and corruption, a gift impossible for a man? Surely not.