Comentario sobre Exodo 12:32

גם צאנכם גם בקרכם קחו TAKE ALSO YOUR FLOCKS AND HERDS — And what is the force of כאשר דברתם AS YE HAVE SPOKEN? It is an allusion to (10:25) “Thou, also, must give into our hands sacrifices and burnt offerings” — it means: take of my cattle also even as ye said.

AND BLESS ME ALSO. The purport of it is that “when you will sacrifice to the Eternal your G-d as you have said, and you will pray for yourselves that He should not strike you with pestilence or sword,²⁹³See above, 5:3. remember me also in your prayers together with yourselves.”
Now Rashi commented: “Pray on my behalf that I should not die, for I am a firstborn.” The plain meaning thereof is that they should bless him and his kingdom, for included within the blessing to a king is the state of peace of the whole kingdom. And in the Mechilta we read:²⁹⁴Mechilta on the verse before us. “And bless me also. Pray on my behalf that the punishment may desist from me,” meaning that he should no longer be punished on their account.

וברכתם גם אותי, "bless me also." The past tense here is to be interpreted as a wish, i.e. "bless me too." Pharaoh meant that not only should the plague stop but that the result of Moses' blessing should be the process of the rehabilitation of Egypt.