After Moses had praised and glorified God, he began to implore His blessing for the tribes. His first prayer to God concerned Reuben, for whom he implored forgiveness for his sin with Bilhah. He said: "May Reuben come to life again in the future world for his good deed in saving Joseph, and may he not remain forever dead on account of his sin with Bilhah. May Reuben's descendants also be heroes in war, and heroes in their knowledge of the Torah."
God granted this prayer and forgave Reuben's sin in accordance with the wish of the other tribes, who begged God to grant forgiveness to their eldest brother. Moses at once perceived that God had granted his prayer, for all the twelve stones in the high priest's breastplate began to gleam forth, whereas formerly Reuben's stone had given forth no light. When Moses saw that God had forgiven Reuben's sin, he at once set about trying to obtain God's pardon for Judah, saying, "Was it not Judah that through his penitent confession of his sin with his daughter-in-law Tamar induced Reuben, too, to seek atonement and repentance!"
The sin for which Moses asked God to forgive Judah was that he had never redeemed his promise to bring Benjamin back to his father. Owing to this sin, his corpse fell to pieces, so that its bones rolled about in their coffin during the forty years' march in the desert. But as soon as Moses prayed to God, saying, "Hear, Lord, the voice of Judah," the bones joined together once more, but his sin was not quite forgiven, for he was not yet admitted to the heavenly academy.
Therefore Moses continued to pray: "Bring him in unto his people," and he was admitted. It did not, indeed, benefit him, for in punishment of his sin, God brought it to pass that he could not follow the discussion of the scholars in heaven, much less take part in them, whereupon Moses prayed: "Let his hands be sufficient for him," and them he no longer sat as one dumb in the heavenly academy. But still his sin was not quite forgiven, for Judah could not succeed in being victorious in the disputes of the learned, hence Moses prayed, "And Thou shalt be an help against his adversaries."
It was only then that Judah's sin was quite forgiven, and that he succeeded in disputes with his antagonists in the heavenly academy.