6 Israel said, "Why did you treat me so badly, telling the man that you had another brother?"
*Minor differences ignored. Grouped by changes, with first version listed as example.
And Israel said,.... In answer to the speech of Judah:
wherefore dealt ye so ill with me; had done that which brought so much evil upon him, gave him so much grief and trouble, and threw him into such perplexity and distress, that he knew not what to do, or course to take:
as to tell the man whether ye had yet a brother? which he thought was done imprudently and unadvisedly, and that there was no need of it; which, had it not been done, would have prevented this anxiety of mind he was now in, and the mischief he feared would follow.1
To the father's reproachful question, why they had dealt so ill with him, as to tell the man that they had a brother, Judah replied: "The man asked after us and our kinsmen: Is your father yet alive? have ye a brother? And we answered him in conformity (פּי על as in Exodus 34:27, etc.) with these words (i.e., with his questions). Could we know, then, that he would say, Bring your brother down?" Joseph had not made direct inquiries, indeed, about their father and their brother; but by his accusation that they were spies, he had compelled them to give an exact account of their family relationships. So that Judah, when repeating the main points of the interview, could very justly give them in the form just mentioned.
*More commentary available at chapter level.