Exodus 10:3 Commentary: Rashi, Ramban, Rashbam & Sforno

לענת Translate as the Targum: TO BE HUMBLED. It is of the same derivation as עני poor, so that the passage signifies, “thou refusest to be poor and lowly before Me”.

AND MOSES AND AARON CAME IN UNTO PHARAOH. Rabbi Abraham ibn Ezra commented: “We know that Moses never came to Pharaoh without being accompanied by Aaron, who was the interpreter.¹¹Above, 7:2. Scripture here makes a point of mentioning Moses and Aaron in order [to make clear] that Pharaoh’s command that both of them be brought again before him¹²Further, Verse 8. and his final act of driving them out¹³Ibid., Verse 11. — something he had not done previously — [applied to the two brothers alike].”

לענות, related to עני, poor, ענוי, oppressed, Pharaoh refused to humble himself, to act as if he was a poor man rather than an autocrat.