This is a quotation within a quotation. It can be stated as an indirect quotation. Alternate translation: "Then you said to your servants that unless our youngest brother comes with us, we would not see you again." (See: [[rc://en/ta/man/translate/figs-quotesinquotes]] and [[rc://en/ta/man/translate/figs-quotations]])
Judah refers to himself and his brothers as "your servants." This is a formal way of speaking to someone with greater authority. Alternate translation: "Then you said to us, your servants" (See: [[rc://en/ta/man/translate/figs-123person]])