Judah steps up with the reminder. Targum Pseudo-Jonathan on Genesis 43:3 records his words to Jacob: "The man attesting attested to us saying, You shall not see the sight of my face unless your youngest brother be with you."
The doubled verb
The Aramaic paraphrase, whose final redaction belongs to the Land of Israel around the seventh or eighth century CE, preserves the Hebrew's emphatic construction — ha'ed he'id, "attesting attested." In biblical Hebrew, doubling a verb intensifies it. Judah is saying that Joseph did not merely warn them; he swore. He testified. He made the condition absolute and formal. The Egyptian ruler's demand was not a bargaining position. It was a locked door.
Judah takes over from Reuben
Notice what has shifted. In Genesis 42, it was Reuben who tried to negotiate with Jacob and failed. Here in Genesis 43, Judah begins the argument. This is the same Judah who had originally proposed selling Joseph to the Ishmaelites (Genesis 37:26-27). The rabbinic tradition in Bereishit Rabbah 85:2, a commentary on Genesis compiled in the Land of Israel around the fifth century CE, reads Judah's emergence as leadership as the beginning of the Messianic line — the line that will run through his descendant David (Ruth 4:18-22) and beyond. The brother who once failed Joseph is now the brother who will save Benjamin.
The takeaway
Leadership in the Torah often emerges from the person who has the most to atone for. Judah's voice rises in this chapter because he needs it to.