Rashi, on Gen 43:20

“They said: Sir, we desire thee to hear us: We came down once before to buy food:”

“בי אדני O, MY LORD — The word בי is an expression of entreaty (בעיא) and supplication. In Aramaic we have בייא בייא “woe, woe!” (Yoma 69b). ירד ירדנו WE CAME INDEED DOWN — This is a “come down” (degradation) for us. We have been accustomed to give food to others and now we are dependent upon you (Genesis Rabbah 92:4).”

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