ציטירנדיקער פּירוש אויף שמות 7:2

On the other hand, it is possible that our verse underlines that even the attribute of Mercy agreed joyfully that the time had arrived to take revenge on this enemy of G'd and the Jewish people (compare my comments on 7,2).

דברו אל כל עדת SPEAK UNTO ALL THE CONGREGATION — But did Aaron speak? Has it not already been stated, (Exodus 7:2) “You (Moses) shall speak etc.”. But the explanation is: they paid respect one to the other, saying to each other, “Instruct me what to say”. and the divine communication in question issued from both of them, so that it was as though they were both speaking (Mekhilta).

Has it not already been stated “You speak?” Rashi’s words are difficult to understand. For perhaps when it says (Shemos 7:2): “You (Moshe) speak,” it means that Moshe speaks to Aharon, but to B’nei Yisrael, both speak together. Furthermore, even if it means that Moshe alone speaks, this was said in connection to Pharaoh, i.e., Moshe speaks alone when he is speaking to Pharaoh, but to B’nei Yisrael both speak. The answer is: Although it is written, “Aharon your brother will be your spokesman” (7:1), Moshe must first concisely tell the message to Pharaoh once, just as he heard it from Hashem. And that is the meaning of, “You (Moshe) speak.” Afterwards, Aharon will express it eloquently until it is palatable to Pharaoh. And the same is true regarding B’nei Yisrael, as it is written (4:16), “He will speak to the people for you.” Aharon will speak [eloquently] to the people for you, but [first] you must concisely tell them the message once. (Re”m)