Ramban, on Gen 42:21

“And they talked one to another: We deserve to suffer these things, because we have sinned against our brother, seeing the anguish of his soul, when he besought us, and we would not hear: therefore is this affliction come upon us.”

“IN THAT WE SAW THE DISTRESS OF HIS SOUL, WHEN HE IMPLORED US. It is obvious that the brothers now considered their display of cruelty towards Joseph as deserving of a greater punishment than the sale itself since it was their blood-brother who was imploring and prostrating himself before them and they remained unmoved. Scripture, however, did not relate there [that Joseph implored them at the time of the sale], either because it is naturally understood that a person would implore his brothers when falling into their grip when their intention is to harm him, swearing by the life of his father, and doing all that is possible to save himself from death. It may be the desire of Scripture to speak only briefly of their sin, or it is possible that it is characteristic of Scripture to speak briefly about a matter in one place, and to elaborate on it in another place. Now Reuben answered them by saying: “Now I already told you at the time that the event took place that you should not sin against him for he is only a lad, and only on account of his youth did he sin against you, and it is therefore fitting for you to gloss over the sins of his youth. And now, his blood also, together with the display of cruelty which you mention, is required.” Perhaps the explanation of the phrase, his blood also, may be: “Even though you have not killed him, G-d will require his blood of you, and it will be accounted to you as if you spilled his blood since he was sold as a permanent slave, for it is possible that being a darling child, unused to work, he died.” Our Rabbis have expounded “The expression, ‘Also’ his blood, implies his blood and the blood of his aged father.””

Imported from an open dataset — not yet checked against the printed edition.