And Leah was with child, and gave birth to a son to whom she gave the name Reuben: for she said, The Lord has seen my sorrow; now my husband will have love for me.
The generations of the sons of Reuben, the oldest son of Israel, were numbered by their families and their fathers' houses, every male of twenty years old and over, who was able to go to war;
But he is to give his first son his birthright, and twice as great a part of his property: for he is the first-fruits of his strength and the right of the first son is his.