6 And Israel said, Wherefore dealt ye so ill with me, as to tell the man whether ye had yet a brother? 7 And they said, The man asked us straitly of our state, and of our kindred, saying, Is your father yet alive? have ye another brother? and we told him according to the tenor of these words: could we certainly know that he would say, Bring your brother down? 8 And Judah said unto Israel his father, Send the lad with me, and we will arise and go; that we may live, and not die, both we, and thou, and also our little ones. 9 I will be surety for him; of my hand shalt thou require him: if I bring him not unto thee, and set him before thee, then let me bear the blame for ever: 10 For except we had lingered, surely now we had returned this second time.
Jacob complains that they ever told the Egyptians about Benjamin. It seems a strange thing to have disclosed, but the sons maintain that the line of inquiry had driven directly to that matter. Very bad luck it might seem to Jacob, but really there was no luck involved in it at all. Joseph knew exactly what he was getting at and intentionally directed the conversation there.
At this point Jacob’s complaints might simply be an attempt postpone the inevitable. I imagine he already knows that he is sending Benjamin with them, but he wants to express his frustration a bit more before doing so.
Now Judah turns to impassioned promises, much like Reuben did earlier. He will be responsible for the lad, and he will answer for anything bad that happens to him. The very same as Reuben has already pledged.
Judah and Reuben. The eldest and youngest of Leah, two blood brothers of Simeon, who still languishes in the Egyptian prison. Reuben who diverted his brothers’ intention to kill Joseph, and Judah who I have suspicions did the same. Thus, both of these men seem to have a track record of brotherly protection, the ones that Jacob could trust most to make good on their promise. And here, in this moment, their brotherly care is twofold. They are pledging protection of one brother, in order that they might rescue a second.